Sunday’s You Tube Moment-The Hardest Puncher You Never Heard of

Edwin Valero has freakish power. Hasn’t really fought the top echelon yet, but his “pop” will help.

Sunday’s You Tube Moment-A Collection of Great Knockouts

There is actually very little known about what exactly causes a knockout but many agree it has to do with minor trauma to the brain stem. This usually happens when the head rotates sharply, often caused by a strike. Source. http://www.wikipedia.com