Ride

Thailand's Princess Sirivannavari Nariratana waves to crowd as she cycles in the "Bike for Dad" event in Bangkok, Thailand, December 11, 2015. Thai Crown Prince Maha Vajiralongkorn led thousand of cyclists on a 29-km course in Bangkok to celebrate King Bhumibol Adulyadej's 88th birthday which fell on December 5.

Chaiwat Subprasom/Reuters

Thailand’s Princess Sirivannavari Nariratana waves to crowd as she cycles in the “Bike for Dad” event in Bangkok, Thailand, on Friday. Thai Crown Prince Maha Vajiralongkorn led thousand of cyclists on a 29-km course in Bangkok to celebrate King Bhumibol Adulyadej’s 88th birthday

Cyclists reflect in a puddle and silhouette against the sky as sun sets near Guelpe, northeastern Germany

Lukas Schulze/DPA/AFP

Cyclists reflect in a puddle and silhouette against the sky as sun sets near Guelpe, northeastern Germany

A rider holds on as a bull tries to throw him during the Bull Ride Spectacular on the first day of the 2014 Deni Ute Muster at the Play on the Plains Festival grounds on October 3, 2014 in Deniliquin, Australia.

Mark Kolbe/Getty Images

A rider holds on as a bull tries to throw him during the Bull Ride Spectacular on the first day of the 2014 Deni Ute Muster at the Play on the Plains Festival grounds on Friday in Deniliquin, Australia.

A man rides a bicycle as he carries his dog on his shoulders in Mumbai...A man rides a bicycle as he carries his dog on his shoulders in Mumbai July 9, 2013. REUTERS/Danish Siddiqui (INDIA - Tags: SOCIETY ANIMALS)

Danish Siddiqui/Reuters

A dog holds on tightly as his owner rides a bicycle in Mumbai, India, on Tuesday