KRASNAYA POLYANA, Russia — Shaun White jammed his wrist on one jump and watched the world's best snowboarders join him in tumbling down the supersized, super-scary Olympic slopestyle course. Quickly, his choice became clear: Time to step away from the danger, and give himself a better chance in the event he knows he can win. The world's most famous snowboarder pulled out of the new Olympic event Wednesday, saying that after much deliberation, he has decided to bypass a chance at winning two gold medals at these games and instead concentrate on the halfpipe, where he'll have a chance to win his third straight title next week.