13. Serra KOs The Unstoppable GSP
Victim: Georges St. Pierre
When: UFC 69, 4/7/2007
Matt Serra knocked out GSP. This doesn't happen...like ever. GSP tried like hell not to go down and when he did, it looked like he was trying to switch places with the referee. This knock out shocked the world and showed MMA fans and fighters alike that St. Pierre wasn't invincible.