A toucan that has a fractured leg receives a shock wave treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. The zoo's veterinary hospital uses acupuncture and laser therapy to improve the health and well-being of animals with chronic diseases. REUTERS/Ueslei Marcelino 

Participants run through the "Electroshock Therapy" obstacle made of hanging electrical wire holding some 10,000 volts in the finish of the "Tough Mudder" endurance event series in Arnsberg September 6, 2014. Competitors who took part in the endurance event saw themselves having to overcome various military style obstacles. REUTERS/Ina Fassbender (GERMANY - Tags: SOCIETY SPORT) 

A participant runs through the "Electroshock Therapy" obstacle, made of hanging electrical wire holding some 10,000 Volts, at the finish of the "Tough Mudder" endurance event series in Arnsberg September 6, 2014. Competitors who took part in the endurance event saw themselves having to overcome various military style obstacles. REUTERS/Ina Fassbender (GERMANY - Tags: SOCIETY SPORT) 

Participants run through the "Electroshock Therapy" obstacle, made of hanging electrical wire holding some 10,000 Volts, in the finish of the "Tough Mudder" endurance event series in Arnsberg September 6, 2014. Competitors who took part in the endurance event saw themselves having to overcome various military style obstacles. REUTERS/Ina Fassbender (GERMANY - Tags: SOCIETY SPORT TPX IMAGES OF THE DAY) 

A participant runs through the "Electroshock Therapy" obstacle, made of hanging electrical wire holding some 10,000 Volts, at the finish of the "Tough Mudder" endurance event series in Arnsberg September 6, 2014. Competitors who took part in the endurance event saw themselves having to overcome various military style obstacles. REUTERS/Ina Fassbender (GERMANY - Tags: SOCIETY SPORT TPX IMAGES OF THE DAY) 

A man crosses the finish line during the "Tough Mudder" obstacle course event in San Bernardino, California March 29, 2014. The event is part of a worldwide tour of extreme obstacle challenges before finishing with the annual "World's Toughest Mudder" competition. The finish line is called "Electroshock Therapy" in which participants are hit with 8,000 volts of electricity each time they touch any of the yellow wires. REUTERS/Gene Blevins (UNITED STATES - Tags: SPORT SOCIETY) 

A man reacts as he crosses the finish line during the "Tough Mudder" obstacle course event in San Bernardino, California March 29, 2014. The event is part of a worldwide tour of extreme obstacle challenges before finishing with the annual "World's Toughest Mudder" competition. The finish line is called "Electroshock Therapy" in which participants are hit with 8,000 volts of electricity each time they touch any of the yellow wires. REUTERS/Gene Blevins (UNITED STATES - Tags: SPORT SOCIETY) 

People cross the finish line during the "Tough Mudder" obstacle course event in San Bernardino, California March 29, 2014. The event is part of a worldwide tour of extreme obstacle challenges before finishing with the annual "World's Toughest Mudder" competition. The finish line is called "Electroshock Therapy" in which participants are hit with 8,000 volts of electricity each time they touch any of the yellow wires. REUTERS/Gene Blevins (UNITED STATES - Tags: SPORT SOCIETY) 

Members of the U.S. San Diego Navy team "Dirty Black Sheep" hold the U.S. flag at the finish line during the "Tough Mudder" obstacle course event in San Bernardino, California March 29, 2014. The event is part of a worldwide tour of extreme obstacle challenges before finishing with the annual "World's Toughest Mudder" competition. The finish line is called "Electroshock Therapy" in which participants are hit with 8,000 volts of electricity each time they touch any of the yellow wires. REUTERS/Gene Blevins (UNITED STATES - Tags: SPORT SOCIETY TPX IMAGES OF THE DAY MILITARY) 

An Israeli policeman places a stun gun on the back of a detained Palestinian man during clashes with Israeli police following Friday prayers in the East Jerusalem neighbourhood of Ras Al Amoud September 27, 2013. An Israeli police spokesman said on Friday that 10 Palestinians were detained on suspicion of throwing stones at policemen who were deployed in the Old City and in nearby Palestinian neighbourhoods of Jerusalem, amid recent tensions over Israel's admittance of Jewish visitors to a holy site in the Old City, which houses the al-Asqa mosque, and which Jews revere as the vestige of their ancient temples. Also on Friday, Israeli police only permitted Palestinian males over the age of 50 to enter al-Aqsa mosque. REUTERS/Nir Elias (JERUSALEM - Tags: POLITICS RELIGION CIVIL UNREST TPX IMAGES OF THE DAY) 

Chy Walton and other supporters hold posters during a vigil for graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW TPX IMAGES OF THE DAY) 

People hold up a poster during a vigil for graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

A close up shows chalk with various words, including one with the name of graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, during a vigil for him in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

An attendee writes on a wall during a vigil for graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

Jacqueline Llach (center L), the mother of graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, holds on to her daughter Offir Hernandez (center R), during Israel's vigil in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

Jacqueline Llach (C), the mother of graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, holds on to her daughter Offir Hernandez (R), during Israel's vigil in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

Jacqueline Llach (C), the mother of graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, attends his vigil with her daughter Offir Hernandez (R), in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

Protestors Auria Gonzalez (L) and Victor Accove hold up posters during a vigil for graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

A man holds a poster during a vigil for graffiti artist Israel Hernandez-Llach, who died after being shocked by a police officer's Taser, in Miami Beach, Florida August 10, 2013. The vigil was held in front of a former McDonald's restaurant building, where police officers reportedly caught Hernandez-Llach spray-painting. The Florida Department of Law Enforcement confirmed in an interview on Friday that it would conduct an independent review of the death of 18-year-old Hernandez-Llach, who died early Tuesday morning after being electroshocked by a Taser during a police chase in Miami Beach. REUTERS/Gaston De Cardenas (UNITED STATES - Tags: POLITICS OBITUARY CRIME LAW) 

Heather Cozad of the U.S. runs through the "Electroshock Therapy" obstacle made of hanging electrical wire holding some 10,000 Volts in the finish of the "Tough Mudder" endurance event series in the Fursten Forest, a former British Army training ground near the north-western German city of Osnabrueck July 13, 2013. The hardcore but un-timed event over 16 km (10 miles) was designed by British Special Forces to test mental as well as physical strength. Some 4,000 competitors had to overcome obstacles of common human fears, such as fire, water, electricity and heights. REUTERS/Wolfgang Rattay (GERMANY - Tags: SOCIETY) 

Participants of the "Tough Mudder" endurance event series run through the "Electroshock Therapy" obstacle made of electrical wire holding some 10,000 Volts in the Fursten Forest, a former British Army training ground near the north-western German city of Osnabrueck July 13, 2013. The hardcore but un-timed event over 16 km (10 miles) was designed by British Special Forces to test mental as well as physical strength. Some 4,000 competitors had to overcome obstacles of common human fears, such as fire, water, electricity and heights. REUTERS/Wolfgang Rattay (GERMANY - Tags: SOCIETY TPX IMAGES OF THE DAY) 

A participant of the "Tough Mudder" endurance event series struggles in the "Electroshock Therapy" obstacle made of electrical wire holding some 10,000 Volts in the Fursten Forest, a former British Army training ground near the north-western German city of Osnabrueck July 13, 2013. The hardcore but un-timed event over 16 km (10 miles) was designed by British Special Forces to test mental as well as physical strength. Some 4,000 competitors had to overcome obstacles of common human fears, such as fire, water, electricity and heights. REUTERS/Wolfgang Rattay (GERMANY - Tags: SOCIETY) 

A participant of the "Tough Mudder" endurance event series reacts as he runs through the "Electroshock Therapy" obstacle made of electrical wires holding some 10,000 Volts in the Fursten Forest, a former British Army training ground near the north-western German city of Osnabrueck July 13, 2013. The hardcore but un-timed event over 16 km (12 miles) was designed by British Special Forces to test mental as well as physical strength. Some 4,000 competitors had to overcome obstacles of common human fears, such as fire, water, electricity and heights. REUTERS/Wolfgang Rattay (GERMANY - Tags: SOCIETY) 

Participants of the "Tough Mudder" endurance event series run through the "Electroshock Therapy" obstacle made of electrical wires holding some 10,000 Volts in the Fursten Forest, a former British Army training ground near the north-western German city of Osnabrueck July 13, 2013. The hardcore but un-timed event over 16 km (10 miles) was designed by British Special Forces to test mental as well as physical strength. Some 4,000 competitors had to overcome obstacles of common human fears, such as fire, water, electricity and heights. REUTERS/Wolfgang Rattay (GERMANY - Tags: SOCIETY) 

A sign that reads "Shock" is seen on the field used for an Ultimate Tak Ball game in Bangkok March 2, 2012. The rules are simple: throw a ball into the goal to score a point. But what makes this game unlike any other is that all the players are armed and ready with stun guns. Each game of Ultimate Tak Ball consists of three periods, with two teams of four players each. Any player in possession of the 24-inch (60 cm) medicine ball is open to unlimited shocking by the players on the opposite team. The stun guns pack 3 to 5 milliamps of electricity, about 10 percent of the power of the taser stun guns used by police. Picture taken March 2. REUTERS/Navesh Chitrakar (THAILAND - Tags: SOCIETY SPORT) 

A taser is displayed after Orange County District Attorney Tony Rackauckas announced that manslaughter charges will be filed against Fullerton police officer Corporal Jay Cicinelli, who used a taser on mentally ill homeless man Kelly Thomas, 37, before his death, in Santa Ana, California September 21, 2011. REUTERS/Lucy Nicholson (UNITED STATES - Tags: CRIME LAW) 

Border Policeman Michel Bachar displays masks and high powered tasers, recently confiscated at the Geneva Cornavin train station, during a press briefing in Cointrin near Geneva, February 3, 2011. Six French nationals were caught carrying all the confiscated items earlier this week, Swiss border police said. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: CRIME LAW IMAGES OF THE DAY) 

A municipal policeman in Nice poses with the Taser X26 model during a presentation in Nice, south eastern France May 27, 2010. REUTERS/Sebastien Nogier (FRANCE - Tags: CRIME LAW) 

Municipal Police in Nice pose with the Taser X26 model in their holsters during a presentation in Nice, south eastern France May 27, 2010. REUTERS/Sebastien Nogier (FRANCE - Tags: CRIME LAW) 

A taser X26 model is demonstrated at a trade show for the Canadian Association of Chiefs of Police in Montreal August 26, 2008. REUTERS/Christinne Muschi (CANADA) 

A taser X26 model and cartridges are displayed at a trade show for the Canadian Association of Chiefs of Police in Montreal August 26, 2008. REUTERS/Christinne Muschi (CANADA) 

A TASER C2, spent cartridges and the probes that are attached to the insulated conductive wires fired from the stun device lie on the dining room table after being fired during a TASER party at the home of Dana Shielder in Phoenix, Arizona, May 22, 2008. To match Reuters Life! TASER-PARTIES/ REUTERS/Jeff Topping (UNITED STATES) 

Taser C2 Personal Protectors are displayed at the Taser booth during the Consumer Electronics Show (CES) in Las Vegas, Nevada January 7, 2008. Taser introduced three new colors for the Taser C2 - Leopard print, Redhot red, and Fashion pink. They also introduced a C2 holster with a built-in MP3 music player. REUTERS/Steve Marcus (UNITED STATES) 

Police and fans clash outside Old Trafford stadium ahead of the Champions League quarter final second-leg soccer match between Manchester United and AS Roma in Manchester, northern England, April 10, 2007. REUTERS/Toby Melville (BRITAIN) 

Jeff Kahn (C) reacts after he was tasered during a demonstration at the Taser International booth during the 2007 International CES in Las Vegas, Nevada January 8, 2007. Taser employees Justin Hesse (L) and Charles Foster keep him from falling. The consumer versions of the law enforcement taser are expected to be available in the Spring and will retail for $299.95-$349.95, a representative said. REUTERS/Steve Marcus (UNITED STATES)