As a sport you would think weight lifting would be pretty safe.  How wrong you would be.  Check out what happens to this guy's quads as he tries squatting 617 lbs.

(warning, this video might be disturbing to some people.)
This was his opener and the first of the 3 lifts and as you watch the video, the snapping noise you hear is both his quadriceps tearing off the bone.

The Weightlifters name is Tommy Dolan, and he's competing at the Irish Power-lifting Organization (IPO) National Championship.

Doctors say after reattaching the quad muscles to the bone he should recover, but his power lifting days are probably over