#9 Matt Serra vs. Georges St-Pierre

When Matt Serra won The Ultimate Fighter 4 (TUF 4 featured fighters who were formerly in the UFC) he got a shot at the welterweight champion Georges St-Pierre. Everyone expected a dominat GSP win but Matt Serra dropped GSP with one punch and followed with some ground and pound finnishing the champion. And still to this day this is one of the biggest upsets in MMA history.

Description source: Wikipedia

#8 Corey Hill leg break

Dale Hart checked Corey Hills leg kick and this is what happened.

#7 Paul Daley cheap shots Josh Koschek

#6 Strikeforce Nashville Brawl

When Jake Shield was doing his post fight interview his rival Jason Miller entered the cage and asked for a rematch and from there things escalated quickly.

Description source: Wikipedia

#5 Scott Smith vs Pete Sell

Pete Sell rocked Scott Smith with a heavy body shot but before being finished Scott managed to land a hard punch that dropped Pete Sell.

Description source: Wikipedia

#4 Terry Martin vs Chris Leben

Human vs Zombie

#3 Gilbert Yvel Knocks out Referee

#2 Double Knockout - LFC 25

So did they both got a KO victory or a KO loss?

#1 Everything involving Nick Diaz