Ronny Keller, a swiss defenseman playing for the EHC Olten in the NLB, got pushed head first against the boards during a playoff game. He was immediately taken to the hospital where he underwent surgery. Doctors said there's only 50% chances he could walk again..
Here's a link to a swiss article where there's a video of the hit
http://www.lematin.ch/sports/hockey/...story/13701924