More drunk people knocking each other out by having a slap contest. Rule of thumb, don't play with the guy that is twice your size.
A couple of kids go at it in the locker room with some boxing gloves and one of them gets knocked out cold.
A fellow soldier shows his buddy how to knock someone out using a karate chop.
He almost landed the jump with his bmx bike but came up short and knocked himself out cold.
This kid is so hammered he manages to knock himself out on a wall hand dryer.
You're supposed to catch the ball with your glove not your forehead.
The bigger kid punches like a girl. The smaller kid knocks out his buddy...lol
The cord snaps and the bar knocks this guy out cold.
These 2 dudes knock each other out at the same time. KO
You can almost hear his skull crack on this headbutt.