A man, wearing a costume, rollerblades during a parade for the upcoming Jewish holiday of Purim outside the Bialik Rogozin school in Tel Aviv March 3, 2015. At Bialik Rogozin, children of migrant workers and refugees are educated alongside native Israelis. Purim is a celebration of the Jews' salvation from genocide in ancient Persia, as recounted in the Book of Esther. REUTERS/Amir Cohen (ISRAEL - Tags: RELIGION SOCIETY) 

A woman rollerblades during "No Car Day" in Bogota February 5, 2015. The event was organized by the mayoral office of Bogota to encourage residents to use other modes of public transportation to help reduce the amount of pollution. REUTERS/John Vizcaino (COLOMBIA - Tags: ENVIRONMENT TRANSPORT SOCIETY) 

A man rollerblades in front of a creation by French artist Lilian Bourgeat during the "A journey to Nantes" (Le Voyage a Nantes) art festival in Nantes, western France, July 10, 2014. REUTERS/Stephane Mahe (FRANCE - Tags: SOCIETY TRAVEL) 

Performers in Qing Dynasty warrior costumes ride rollerblades during a performance to celebrate the traditional Chinese Spring Festival on the second day of the Chinese Lunar New Year at the Old Summer Place in Beijing, February 1, 2014.
REUTERS/Kim Kyung-Hoon (CHINA - Tags: ANNIVERSARY SOCIETY) 

Performers in Qing Dynasty warrior costumes ride rollerblades during a performance to celebrate the traditional Chinese Spring Festival on the second day of the Chinese Lunar New Year at the Old Summer Place in Beijing, February 1, 2014.
REUTERS/Kim Kyung-Hoon (CHINA - Tags: ANNIVERSARY SOCIETY) 

For TRAVEL-MINNEAPOLIS/

Rollerbladers skate past fishermen sitting in the shade as they seek relief from high temperatures by Lake Calhoun in Minneapolis, July 18, 2011. REUTERS/Eric Miller/Files (UNITED STATES - Tags: ENVIRONMENT SOCIETY TRAVEL) 

Revellers participate in the Carnaval des Fleurs, or Carnival of Flowers, during the three-day festival in Port-au-Prince, July 29, 2013. REUTERS/Marie Arago (HAITI - Tags: SOCIETY) 

An elderly attendee of a roller-skating lesson trains at a park in Russia's Siberian city of Krasnoyarsk July 24, 2012. Enthusiast Valentina Arkhipova, an instructor from the Physical Culture, Sports and Tourism Institute under the Siberian Federal University, conducts lessons free of charge twice a week for about 70 elderly retirees, aged between 55 and 73, who want to master roller-skating. REUTERS/Ilya Naymushin (RUSSIA - Tags: SOCIETY SPORT) 

An Afghan boy skates on the hill in Kabul May 7, 2012. REUTERS/Mohammad Ismail (AFGHANISTAN - Tags: SOCIETY) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A man rollerblades in front of a tank near the Holy defence museum in northern Tehran October 14, 2011. REUTERS/Morteza Nikoubazl (IRAN - Tags: MILITARY SOCIETY) 

Rollerbladers skate past fishermen sitting in the shade as they seek relief from high temperatures by Lake Calhoun in Minneapolis, July 18, 2011. A heat wave with oppressive temperatures and stifling humidity lingered and intensified in the midsection of the country on Monday and was expected to expand eastward as the week continued. REUTERS/Eric Miller (UNITED STATES - Tags: ENVIRONMENT SOCIETY) 

French extreme inline skating champion Taig Khris soars through the air as he performs a free jump in Paris July 2, 2011. REUTERS/Gonzalo Fuentes (FRANCE - Tags: SPORT) 

Mercedes Formula One driver Michael Schumacher of Germany roller blades down the track in the rain ahead of the Malaysian F1 Grand Prix at the Sepang circuit outside Kuala Lumpur April 7, 2011. REUTERS/Bazuki Muhammad (MALAYSIA - Tags: SPORT MOTOR RACING ENVIRONMENT IMAGES OF THE DAY) 

The wheels on a roller skate are pictured as a member of the Detroit Derby Girls Travel Team warms up before battling The Chicago Outfit Syndicate during a women's flat track roller derby bout in Detroit, Michigan April 2, 2011. Picture taken April 2, 2011. REUTERS/Eric Thayer (UNITED STATES - Tags: SOCIETY SPORT) 

A boy rollerblades on an empty boulevard during a blockade in central Sofia March 27, 2011. Thousands of Bulgarians protested on Sunday against high fuel prices which have put pressure on living standards in the European Union's poorest country. REUTERS/Stoyan Nenov (BULGARIA - Tags: TRANSPORT CIVIL UNREST POLITICS ENERGY BUSINESS) 

Friar Anthony rollerblades in downtown Rome February 24, 2011. REUTERS/Max Rossi (ITALY - Tags: RELIGION SOCIETY) 

Friar Anthony rollerblades in downtown Rome February 24, 2011. REUTERS/Max Rossi (ITALY - Tags: RELIGION SOCIETY) 

A boy jumps as he skates on roller blades in Corniche Al Manara on the Beirut riviera, January 13, 2011. REUTERS/Jamal Saidi (LEBANONSOCIETY DAY - Tags: SOCIETY SPORT IMAGES OF THE DAY) 

Taiwan's Sung Ching Yang reacts after crossing the finish line after winning the men's 300 meters Roller time trial race during the 16th Asian Games in Guangzhou, Guangdong province, November 23, 2010. Sung won the gold medal. REUTERS/Carlos Barria (CHINA - Tags: SPORT IMAGES OF THE DAY) 

A man on rollerblades is pulled by a horse during the farmers' horse and trotter race event in Schwarzenburg near Bern October 3, 2010. Picture taken October 3, 2010. REUTERS/Michael Buholzer (SWITZERLAND ) BEST QUALITY AVAILABLE 

A man on rollerblades is pulled by a horse during the farmers' horse and trotter race event in Schwarzenburg near Bern October 3, 2010. Picture taken October 3, 2010. REUTERS/Michael Buholzer (SWITZERLAND ) BEST QUALITY AVAILABLE 

A man on rollerblades is pulled by a horse during the farmers' horse and trotter race event in Schwarzenburg near Bern October 3, 2010. Picture taken October 3, 2010. REUTERS/Michael Buholzer (SWITZERLAND ) BEST QUALITY AVAILABLE 

A man on rollerblades is pulled by a horse during the farmers' horse and trotter race event in Schwarzenburg near Bern October 3, 2010. REUTERS/Michael Buholzer (SWITZERLAND - Tags: SPORT SOCIETY IMAGES OF THE DAY) 

A man on rollerblades is pulled by a horse during the farmers horse and trotter race event in Schwarzenburg near Bern October 3, 2010. REUTERS/Michael Buholzer (SWITZERLAND - Tags: SPORT) 

Demonstrators on roller blades carry a huge Russian state flag as they mark Flag day and the anniversary of the 1991 coup in St. Petersburg, August 22, 2010. REUTERS/Alexander Demianchuk (RUSSIA - Tags: POLITICS CIVIL UNREST) 

Members of a special all-volunteer Israeli police unit rollerblade on the beach promenade during a routine patrol in Tel Aviv February 22, 2010. The 50-member unit was set up to enhance police presence in areas inaccessible by vehicles. The unit began operating on January 1, 2010. REUTERS/Gil Cohen Magen (ISRAEL - Tags: POLITICS CIVIL UNREST TRANSPORT) 

Members of a special all-volunteer Israeli police unit rollerblade on the beach promenade during a routine patrol in Tel Aviv February 22, 2010. The 50-member unit was set up to enhance police presence in areas inaccessible by vehicles. The unit began operating on January 1, 2010. REUTERS/Gil Cohen Magen (ISRAEL - Tags: POLITICS CIVIL UNREST TRANSPORT) 

Members of a special all-volunteer Israeli police unit rollerblade on the beach promenade during a routine patrol in Tel Aviv February 22, 2010. The 50-member unit was set up to enhance police presence in areas inaccessible by vehicles. The unit began operating on January 1, 2010. REUTERS/Gil Cohen Magen (ISRAEL - Tags: POLITICS CIVIL UNREST TRANSPORT) 

Members of a special all-volunteer Israeli police unit rollerblade on the beach promenade during a routine patrol in Tel Aviv February 22, 2010. The 50-member unit was set up to enhance police presence in areas inaccessible by vehicles. The unit began operating on January 1, 2010. REUTERS/Gil Cohen Magen (ISRAEL - Tags: POLITICS CIVIL UNREST TRANSPORT) 

A rollerblader wears shorts during a spring-like day at Vancouver's English Bay during the Vancouver 2010 Winter Olympics February 19, 2010. REUTERS/Mike Blake (CANADA) 

A man laces on his rollerblades despite heavy snow at Central Park in New York, December 20, 2009. Heavy snowfall blanketed the East Coast on Saturday, disrupting public transport and air travel, and hampering holiday shoppers on the last weekend before Christmas. REUTERS/Finbarr O'Reilly (UNITED STATES - Tags: ENVIRONMENT) 

A skater in swimsuit dances behind a policeman during an attempt to break the Guinness World Record for the largest swimwear parade at one time, in Sydney November 12, 2009. REUTERS/Daniel Munoz (AUSTRALIA SOCIETY IMAGES OF THE DAY) 

Cyclists and rollerbladers protest during a night ride in central Tel Aviv June 23, 2009. Around 200 protestors took part in the demonstration against a proposed legislation which would require helmets for all cyclists and rollerbladers. REUTERS/Gil Cohen Magen (ISRAEL SPORT CYCLING POLITICS SOCIETY) 

Inline skater passes in front of the Victory column during a demonstration demanding more rights for inline skaters on public roads where several hundreds skaters tours through the city in Berlin, April 13, 2009. REUTERS/Fabrizio Bensch (GERMANY POLITICS CONFLICT SPORT) 

Force India Formula One driver Adrian Sutil of Germany rollerblades at a media opportunity ahead of the weekend's Australian Grand Prix in Melbourne March 25, 2009. REUTERS/Mick Tsikas (AUSTRALIA SPORT MOTOR RACING IMAGE OF THE DAY TOP PICTURE) 

Force India Formula One driver Adrian Sutil (R) of Germany rollerblades with Australian inline figure skater Kristen Slade at a media opportunity ahead of the weekend's Australian Grand Prix in Melbourne March 25, 2009. REUTERS/Mick Tsikas (AUSTRALIA SPORT MOTOR RACING FIGURE SKATING) 

A pro-Tibet activist attends a demonstration in Warsaw March 10, 2009 to mark the 50th anniversary of the Tibetan uprising against China. The Dalai Lama marked 50 years in exile on Tuesday by demanding "meaningful autonomy" for his Tibetan homeland, where Chinese authorities tightened security to stifle protests against their rule. REUTERS/Vasily Fedosenko (POLAND POLITICS CONFLICT RELIGION ANNIVERSARY) 

Larry Page (L) and Sergey Brin, founders of Google, show the new G1 phone running Google's Android software in New York September 23, 2008. T-Mobile USA, a Deutsche Telekom AG unit, will sell the first phone powered by Google Inc's Android operating system under the brand name T-Mobile G1, said its partner Amazon.com Inc on Tuesday. REUTERS/Jacob Silberberg (UNITED STATES) 

Schoolchildren entertain the crowd in the National Stadium before the arrival of the runners in the women's marathon of the athletics competition during the Beijing 2008 Olympic Games August 17, 2008. REUTERS/Mike Blake (CHINA) 

Lebanese American Fatme Nemer, who works as a receptionist, rollerblades with her son Hadi Bahmad in a stroller while wearing her Muslim hijab at a park after getting off work from her job in Dearborn, Michigan, August 17, 2007. Women who cover up for their faith may encounter problems getting some kinds of work outside the Muslim world, particularly jobs requiring them to interact with the public. Picture taken August 17, 2007. To match feature WORK-WOMEN/HEADGEAR REUTERS/Rebecca Cook (UNITED STATES) 

Lebanese American Fatme Nemer, who works as a receptionist, skates with her son Hadi Bahmad in a stroller while wearing her Muslim hijab at a park after getting off work from her job in Dearborn, Michigan, August 17, 2007. Women who cover up for their faith may encounter problems getting some kinds of work outside the Muslim world, particularly jobs requiring them to interact with the public. Picture taken August 17, 2007. To match feature WORK-WOMEN/HEADGEAR REUTERS/Rebecca Cook (UNITED STATES) 

Skaters and a cyclist enjoy a sunny day at Berlin's Grunewald forest April 12, 2007. REUTERS/Arnd Wiegmann (GERMANY) 

A woman walks a dog as others rollerblade and jog along the waterfront at East Coast Park in Singapore February 7, 2007. For years, Singapore has taken a utilitarian view of water - Great for shipping, for rinsing semiconductors, and for developing water membranes. But as the city-state upgrades its economy to move away from manufacturing activities to focus on financial services and tourism, the government is discovering other uses for water as it tries to jazz up the country. To match feature SINGAPORE-WATERFRONT REUTERS/Vivek Prakash (SINGAPORE) 

A woman walks a dog as others rollerblade and jog along the waterfront at East Coast Park in Singapore February 7, 2007. For years, Singapore has taken a utilitarian view of water. Great for shipping, for rinsing semiconductors, and for developing water membranes. But as the city-state upgrades its economy to move away from manufacturing activities to focus on financial services and tourism, the government is discovering other uses for water as it tries to jazz up the country. To match feature SINGAPORE-WATERFRONT/ REUTERS/Vivek Prakash (SINGAPORE) 

Jockeys pull a men on rollerblades during the farmer horse and trotter race event in
Schwarzenburg near Bern October 8, 2006. REUTERS/Pascal Lauener (SWITZERLAND) 

A jockey pulls a man on rollerblades during the farmer horse and trotter race event in
Schwarzenburg near Bern October 8, 2006. REUTERS/Pascal Lauener (SWITZERLAND) 

Jockeys pull a men on rollerblades during the farmer horse and trotter race event in
Schwarzenburg near Bern October 8, 2006. REUTERS/Pascal Lauener (SWITZERLAND) 

Commuters bike and rollerblade down Fifth Avenue in New York December 20, 2005. New York's first transit strike in 25 years failed to cripple Wall Street on Tuesday, with major firms reporting that key staff commuted to work via chartered buses, by foot and by hitching rides. REUTERS/Keith Bedford 

Naked cyclists take part in a nude cyclist march through central Madrid on World Naked Bike Ride Day,June 11, 2005. Nude cyclists protested against oil dependency and car culture by pedalling through the centre of Madrid demanding better rights for bike riders in a city where bicycle lanes are almost unheard of.REUTERS/Susana Vera SV/LA 

A women dressed as Lady Liberty rollerblades in the 31st Annual New York's Village Halloween Parade in New York City October 31, 2004. The parade drew approximately two million people onto the streets of New York's Greenwich Village. REUTERS/Seth Wenig SW 

A Chechen boy rollerblades through the corridors of a refugee centre in Moszno, near Poland's capital Warsaw September 20, 2004. The refugee centre houses 182 people, most of them Chechen, where they wait for a verdict on their refugee status. The number of Chechens crossing the border into Poland has doubled since the Beslan school siege in southern Russia earlier this month. REUTERS/Katarina Stoltz KS 

Job seekers tests their rollerblading skills for a customer service role at the Avenue of Stars, Hong Kong's new tourist attraction, March 7, 2004. The city's five-year deflation cycle has shown signs of easing but a marked improvement in the rate of unemployment, which stood at 7.3 per cent in January, could be slow in coming. REUTERS/Kin Cheung KC/SH 

A job seeker tests her rollerblading skills required for a customer service role at the Avenue of Stars, Hong Kong's new tourist attraction March 7, 2004. The city's five-year deflation cycle has shown signs of easing but a marked improvement in the rate of unemployment, which stood at 7.3 per cent in January, could be slow in coming. REUTERS/Kin Cheung KC/SH 

-PHOTO TAKEN 15OCT03- Special Paris rollerblade police unit member scares pigeons into flight near The Louvre museum during day of service in the French capital. Photo taken October 15, 2003. 

-PHOTO TAKEN 04NOV03- Special Paris rollerblade police unit participate in a training session November 4, 2003. One of their colleagues plays the role of a criminal as the three others practice taking a felon into custody and the difficult task of transporting him to the police station while wearing their rollerblades. 

-PHOTO TAKEN 04NOV03- Special Paris rollerblade police unit participate in a training session November 4, 2003. One of their colleagues plays the role of a criminal as the three others practice taking a felon into custody and the difficult task of transporting him to the police station while wearing their rollerblades. 

-PHOTO TAKEN 03NOV03- Special Paris rollerblade police unit move up the Avenue des Champs Elysees during day of service in the French capital. Photo taken November 3, 2003. 

-PHOTO TAKEN 15OCT03- Special Paris rollerblade police unit check a motorist's papers during day of service in the French capital. Photo taken October 15, 2003. 

-PHOTO TAKEN 15OCT03- Special Paris rollerblade police unit member jumps a flight of steps near The Louvre museum during day of service in the French capital. Photo taken October 15, 2003. 

-PHOTO TAKEN 15OCT03- Special Paris rollerblade police unit check a motorist's papers near the Paris Opera during day of service in the French capital. Photo taken October 15, 2003.