Well, if you run across that video on the net, I would urge you to give serious thought to the matter before you view it. It is very grisly. I could not get the image out of my head for weeks (literally). The guy was going to kick his opponent and his opponent sort of kicked the guy's leg in the shins as a way to block it. You've got two bones in your lower leg. With the combined power, they both snapped clean. The worst part was, the guy attempted to stand on the leg (bringing it down from the kick) and it just sort of... Folded... Where a leg ought not to fold.
The referee, naturally, stopped the fight.
One word. Theismann. I get chills to this day....