(L-R) Motorcyclists Radek Bilek from Czech, Ilkka Salo from Finland, Jimmy Hill from the U.S. and Martin Schenk from Austria take part in the "Cirque Adrenaline" circus show in Hong Kong, Dec. 17, 2015. In the show, daredevil motorcyclists perform complex stunts both on the ground and high above the stage. (Photo: China News Service/Hong Shaokui)
