This is one of if not the hardest hockey checks I've ever seen. The guy actually shatters the glass....

This just looks so painful. It's all fun and games until you get knocked out by a drawer door....

This fight lasts a whole 10 seconds. In those 10 seconds though the kid takes 4 punches to the face and goes down....

8th grade basketball fight. This kid takes a punishing blow right to the neck and a few more after he gets knocked ...

This guy is mad that the bouncer wont let him in so he punches the bouncer in the face then takes a knockout punch ...

The best knockouts of Mike Tyson's career. I give who ever made this video props, it highlights his career perfectl...

This kid lets his buddy punch him in the jaw. Little does he know that he will be knocked out cold. What an idiot!...

Some of the best knockouts I've ever seen. The ufc is a great source of knockouts like these....

the one black guy is 6'5" and the guy he's fighting is only 5'7". I don't see how that is really fair at all....

Wow this guy never say that punch coming. This is one of the best knock outs I've ever seen....