Slackline athlete Jaan Roose makes a backflip as he balances on a rope in Laadi, Estonia April 30, 2020. Picture taken April 30, 2020. REUTERS/Ints Kalnins

Mar 7, 2020; South Bend, Indiana, USA; The Notre Dame leprechaun and a cheerleader do backflips during a timeout in the second half of the game between the Notre Dame Fighting Irish and the Virginia Tech Hokies at the Purcell Pavilion. Mandatory Credit: Matt Cashore-USA TODAY Sports

Feb 29, 2020; Indianapolis, Indiana, USA; Butler Bulldogs cheerleaders do a backflip during a timeout against the DePaul Blue Devils at Hinkle Fieldhouse. Mandatory Credit: Thomas J. Russo-USA TODAY Sports

A man backflips off a ledge on the River Thames during sunny weather in London, Britain, January 19, 2020. REUTERS/Henry Nicholls

A man backflips off a ledge on the River Thames during sunny weather in London, Britain, January 19, 2020. REUTERS/Henry Nicholls

A man backflips off a ledge on the River Thames during sunny weather in London, Britain, January 19, 2020. REUTERS/Henry Nicholls

Jan 5, 2020; Champaign, Illinois, USA; Illinois Fighting Illini cheerleaders complete backflips during the first half against the Purdue Boilermakers at State Farm Center. Mandatory Credit: Patrick Gorski-USA TODAY Sports

Jan 4, 2020; Indianapolis, Indiana, USA; A Butler Bulldogs cheerleader does a backflip during a stoppage in play against the Creighton Bluejays at Hinkle Fieldhouse. Mandatory Credit: Thomas J. Russo-USA TODAY Sports

Athletics - World Athletics Championships - Doha 2019 - Men's Pole Vault Final - Khalifa International Stadium, Doha, Qatar - October 1, 2019 Sam Kendricks of the U.S., Poland's Piotr Lisek and Sweden's Armand Duplantis celebrate as they do a backflip REUTERS/Dylan Martinez

Athletics - World Athletics Championships - Doha 2019 - Men's Pole Vault Final - Khalifa International Stadium, Doha, Qatar - October 1, 2019 Sam Kendricks of the U.S., Poland's Piotr Lisek and Sweden's Armand Duplantis do a backflip REUTERS/Dylan Martinez

Aug 31, 2019; Champaign, IL, USA; An Illinois Fighting Illini cheerleader completes a backflip during the first half against the Akron Zips at Memorial Stadium. Mandatory Credit: Patrick Gorski-USA TODAY Sports

Feb 19, 2019; South Bend, IN, USA; The Notre Dame Leprechaun does a backflip in the first half of the game between the Notre Dame Fighting Irish and the Wake Forest Demon Deacons at the Purcell Pavilion. Mandatory Credit: Matt Cashore-USA TODAY Sports

Feb 7, 2019; Coral Gables, FL, USA; Miami Hurricanes cheerleader does a backflip during a game against the Notre Dame Fighting Irish at Watsco Center. Mandatory Credit: Steve Mitchell-USA TODAY Sports

Feb 7, 2019; Coral Gables, FL, USA; Miami Hurricanes cheerleader does a backflip during a game against the Notre Dame Fighting Irish at Watsco Center. Mandatory Credit: Steve Mitchell-USA TODAY Sports

Feb 6, 2019; Coral Gables, FL, USA; A Miami Hurricanes cheerleader performs a backflip during the first half against the Notre Dame Fighting Irish at Watsco Center. Mandatory Credit: Steve Mitchell-USA TODAY Sports

Jan 25, 2019; Kissimmee, FL, USA; Kansas City Chiefs receiver Tyreek Hill (10) does a backflip during AFC practice at ESPN Wide World of Sports Complex. Mandatory Credit: Kirby Lee-USA TODAY Sports

Jan 25, 2019; Kissimmee, FL, USA; Kansas City Chiefs receiver Tyreek Hill (10) does a backflip during AFC practice at ESPN Wide World of Sports Complex. Mandatory Credit: Kirby Lee-USA TODAY Sports

Jan 19, 2019; South Bend, IN, USA; The Notre Dame Leprechaun does a backflip in the second half of the game between the Notre Dame Fighting Irish and the North Carolina State Wolfpack at the Purcell Pavilion. Mandatory Credit: Matt Cashore-USA TODAY Sports

Jan 5, 2019; Knoxville, TN, USA; In this slow shutter speed image, the Tennessee Volunteers cheerleaders perform a backflip after a free throw against the Georgia Bulldogs during the first half at Thompson-Boling Arena. Mandatory Credit: Randy Sartin-USA TODAY Sports

A member of the Y-Studs A Cappella singing group performs a backflip off the stage as they perform before U.S. President Donald Trump and first lady Melania Trump host a Hanukkah reception at the White House in Washington, U.S., December 6, 2018. REUTERS/Jonathan Ernst

A man backflips from a diving board on Salthill beach during sunny weather in Galway, Ireland June 26, 2018. REUTERS/Clodagh Kilcoyne

Boxing Britain - Luis Concepcion v Kal Yafai WBA World Super-Flyweight Title - Manchester Arena - 10/12/16 Luis Concepcion does a back flip after defeat Action Images via Reuters / Andrew Couldridge EDITORIAL USE ONLY.

A competitor does a backflip off his surfboard during the Haunted Heats Halloween Surf Contest in Santa Monica, California, U.S., October 29, 2016. REUTERS/Lucy Nicholson

Football Soccer - Portugal v Belgium - International friendly match - Magalhaes Pessoa stadium, Leiria, Portugal - 29/03/16. Portugal's Nani celebrates his goal against Belgium. REUTERS/Rafael Marchante

Football Soccer - Portugal v Belgium - International friendly match - Magalhaes Pessoa stadium, Leiria, Portugal - 29/03/16. Portugal's Nani (L) celebrates his goal against Belgium. REUTERS/Rafael Marchante

A girl does a backflip during a campaign rally with U.S. Democratic presidential candidate and U.S. Senator Bernie Sanders in Fort Collins, Colorado February 28, 2016. REUTERS/Brian Snyder

Folk artist Zhang Zhijiu trains his monkey to flip as they practice for a traditional performance at Baowan village, in Xinye county of China’s central Henan province, February 3, 2016. Baowan village of China’s central Henan province appears to be your average farming community from the surface, but at a closer look, one can hear monkey hoots from every direction. Although no official number exists, villagers say that they have been a breeding ground for both monkeys and monkey trainers for centuries. REUTERS/Jason Lee

Folk artist Zhang Zhijiu trains his monkey to perform flips at his home at Baowan village, in Xinye county of China’s central Henan province, February 3, 2016. Baowan village of China’s central Henan province appears to be your average farming community from the surface, but at a closer look, one can hear monkey hoots from every direction. Although no official number exists, villagers say that they have been a breeding ground for both monkeys and monkey trainers for centuries. REUTERS/Jason Lee

A person flips midair during a bicycle trick at the premiere of "Point Break" in Hollywood, California December 15, 2015. The movie opens in the U.S. on December 25. REUTERS/Mario Anzuoni

A person flips in midair during a bicycle trick at the premiere of "Point Break" in Hollywood, California December 15, 2015. The movie opens in the U.S. on December 25. REUTERS/Mario Anzuoni

Cameron Shonnard backflips a jump at Squaw Valley in Olympic Valley, California, December 5, 2015. An El Nino is forecasted for California, and regular precipitation has been welcomed after years of drought. Picture taken December 5. REUTERS/Max Whittaker

Cameron Shonnard backflips a jump at Squaw Valley in Olympic Valley, California, December 5, 2015. An El Nino is forecasted for California, and regular precipitation has been welcomed after years of drought. REUTERS/Max Whittaker TPX IMAGES OF THE DAY

Boxing - Lewis Pettitt v Bobby Jenkinson - SSE Arena, Wembley, London - 26/9/15
Bobby Jenkinson celebrates his win against Lewis Pettitt
Mandatory Credit: Action Images / Alex Morton
Livepic
EDITORIAL USE ONLY.

Boxing - Lewis Pettitt v Bobby Jenkinson - SSE Arena, Wembley, London - 26/9/15
Bobby Jenkinson celebrates his win against Lewis Pettitt
Mandatory Credit: Action Images / Alex Morton
Livepic
EDITORIAL USE ONLY.

A man does a flip into the "JumpIn!" ball pit, an interactive art installation by creative agency Pearlfisher made up of 81,000 white balls, in New York City August 25, 2015. The installation is hosted at the agency's new SoHo office and open to the public from August 21 till September 21, to promote how play can yield results for creative thinking. REUTERS/Mike Segar

A man performs a backflip during a hot summer day in Rome, Italy, July 17, 2015. A heat wave coming from Africa is spreading across Italy with temperatures forecast to reach 40 degrees Celsius (104 degrees Fahrenheit), reported local weather officials. REUTERS/Max Rossi TPX IMAGES OF THE DAY

Inter Milan's Hernanes jumps in celebration after scoring against AS Roma during their Serie A soccer match at the San Siro stadium in Milan, Italy, April 25, 2015. REUTERS/Stefano Rellandini TPX IMAGES OF THE DAY

A biker is silhouetted as he performs a backflip jump during a bike festival in front of city hall in Vienna, April 11, 2015. REUTERS/Leonhard Foeger TPX IMAGES OF THE DAY

Phil Mohun does a back flip off of his family home after clearing snow from the roof following a massive snowstorm in Cowlesville, New York, November 22, 2014. Warm temperatures and rain were forecast for the weekend in the city of Buffalo and western New York, bringing the threat of widespread flooding to the region bound for days by deep snow. REUTERS/Mark Blinch (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY)

People are silhouetted as they take pictures of a biker performing a backflip jump during the 5th Athens Bike Festival, September 20, 2014. REUTERS/Alkis Konstantinidis (GREECE - Tags: SPORT CYCLING SOCIETY)

A biker is silhouetted as he performs a backflip jump during the 5th Athens Bike Festival, September 20, 2014. REUTERS/Alkis Konstantinidis (GREECE - Tags: SPORT CYCLING SOCIETY)

James De La Rosa of Mexico celebrates his victory over Alfredo Angulo of Mexico with a back flip following a middleweight bout at the MGM Grand Garden Arena in Las Vegas, Nevada September 13, 2014. REUTERS/Richard Brian (UNITED STATES - Tags: SPORT BOXING TPX IMAGES OF THE DAY)

Germany's Miroslav Klose celebrates after scoring against Ghana during their 2014 World Cup Group G soccer match at the Castelao arena in Fortaleza June 21, 2014. REUTERS/Eddie Keogh (BRAZIL - Tags: SPORT SOCCER WORLD CUP)

Brantley Gilbert performs "Bottoms Up" during the 2014 CMT Music Awards in Nashville, Tennessee June 4, 2014. REUTERS/Harrison McClary (UNITED STATES - Tags: ENTERTAINMENT)

Iraqi Shi'ite youths play at a swimming pool in Sadr City in Baghdad May 4, 2014. Iraq is now gripped by its worst violence since the heights of its 2005-2008 sectarian war, and Sunni Islamist insurgents who target Shi'ites have been regaining ground in the country over the past year. But despite the instability, daily life continues in poor Shi'ite neighbourhoods of Baghdad such as Al-Fdhiliya and Sadr City - a sprawling slum marred by poor infrastructure and overcrowding. Picture taken May 4, 2014. REUTERS/Ahmed Jadallah (IRAQ - Tags: CIVIL UNREST SOCIETY POLITICS)

ATTENTION EDITORS: PICTURE 20 OF 32 FOR PACKAGE 'SOCCER, SALONS AND SWIMMING IN SADR CITY'. TO FIND ALL IMAGES SEARCH 'SADR JADALLAH'

Dancers perform on the red carpet as they arrive for the screening of the film "Geronimo" presented as part of the specials screenings at the 67th Cannes Film Festival in Cannes May 20, 2014. REUTERS/Yves Herman (FRANCE - Tags: ENTERTAINMENT)

A girl performs a flip in St. Peter's Square at the Vatican April 24, 2014. Two giants of Roman Catholicism in the 20th century will become saints on April 27, 2014 at an unprecedented twin canonisation that has aroused both joy and controversy in the 1.2 billion-member Church. Pope John XXIII, who reigned from 1958 to 1963 and called the modernising Second Vatican Council, and Pope John Paul II, who reigned for nearly 27 years before his death in 2005 and whose trips around the world made him the most visible pope in history, will be declared saints by Pope Francis. REUTERS/Alessandro Bianchi (VATICAN - Tags: RELIGION SOCIETY)

Kazakhstan's Yulia Galysheva does a backflip during the women's freestyle skiing moguls final competition at the 2014 Sochi Winter Olympic Games in Rosa Khutor, February 8, 2014. REUTERS/Lucas Jackson (RUSSIA - Tags: SPORT SKIING OLYMPICS)

AS Monaco's Emmanuel Riviere celebrates after scoring against Olympique Marseille during their French Ligue 1 soccer match at Louis II stadium in Monaco January 26, 2014. REUTERS/Eric Gaillard (MONACO - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

Young Libyans practise parkour on the beach in Benghazi November 22, 2013. REUTERS/Esam Omran Al-Fetori (LIBYA - Tags: SOCIETY SPORT TPX IMAGES OF THE DAY)

Elladj Balde of Canada performs a backflip during the Skate Canada International figure skating exhibition gala in Saint John, New Brunswick, October 27, 2013. REUTERS/Mark Blinch (CANADA - Tags: SPORT FIGURE SKATING)

Zakaria Alakory (L), 19, and Assem Al khshmy (R), 16, practice parkour on the beach in Benghazi August 15, 2013. Picture taken August 15, 2013. REUTERS/Esam Omran Al-Fetori (LIBYA - Tags: SOCIETY)

Italy's team perform in the synchronised swimming team technical final during the World Swimming Championships at the Sant Jordi arena in Barcelona July 22, 2013. REUTERS/Albert Gea (SPAIN - Tags: SPORT SWIMMING TPX IMAGES OF THE DAY)

Kids in camouflage clothes attend a physical training session in a kindergarten in Taichung, central Taiwan, July 15, 2013. A kindergarten in Taiwan provides physical training sessions, a series of exercises that combines marine drills and gymnastics for pre-school and school aged kids. The training helps children grow well in both mind and body, according to the principal. REUTERS/Pichi Chuang (TAIWAN - Tags: SOCIETY TPX IMAGES OF THE DAY)

BASE jumper Vladimir Murzajev of Russia backflips as he leaps before opening his parachute during Tallinn TV Tower B.A.S.E. Boogie 2013 event July 11, 2013. More than 60 BASE jumpers from fourteen countries are taking part in this annual event. REUTERS/Ints Kalnins (ESTONIA - Tags: SPORT SOCIETY TPX IMAGES OF THE DAY)

Aston of British pop group JLS backflips off the pitch following their performance ahead of the charity soccer match between Manchester United Legends and Real Madrid Legends at Old Trafford in Manchester, northern England June 2, 2013. REUTERS/Phil Noble (BRITAIN - Tags: SPORT SOCCER ENTERTAINMENT)

Aston of British pop group JLS backflips off the pitch following their performance ahead of the charity soccer match between Manchester United Legends and Real Madrid Legends at Old Trafford in Manchester, northern England June 2, 2013. REUTERS/Phil Noble (BRITAIN - Tags: SPORT SOCCER ENTERTAINMENT TPX IMAGES OF THE DAY)

Lazio's Hernanes (R) celebrates after scoring against AS Roma during their Italian serie A soccer match at the Olympic stadium in Rome April 8, 2013. REUTERS/Giampiero Sposito (ITALY - Tags: SPORT SOCCER TPX IMAGES OF THE DAY)

New York Giants David Wilson does a backflip as he celebrates scoring a touchdown against the Philadelphia Eagles in the first quarter during their NFL football game in East Rutherford, New Jersey, December 30, 2012. REUTERS/Gary Hershorn (UNITED STATES - Tags: SPORT FOOTBALL)

New York Giants David Wilson does a backflip as he celebrates scoring a touchdown against the Philadelphia Eagles in the first quarter during their NFL football game in East Rutherford, New Jersey, December 30, 2012. REUTERS/Gary Hershorn (UNITED STATES - Tags: SPORT FOOTBALL)