American snowboarder Shaun White recently declined to participate in some of Sochi's snowboarding events for exactly the reason you see above. Numerous injuries on the slope course and complaints about the safety of the event have evidently fallen on deaf ears.
Don't believe whatever else you're seeing on the internet right now. This is not an April Fools prank gone wrong, nor is that a student on the ground here. It turns out the poor victim of nut-smashing is actually a fellow teacher who volunteered for the act. Even better, he took it like a champ and shrugged off the whole thing when it was all over: