EA UFC 2 is truly a phenomenal fighting game and is probably one of the top 3 best MMA games of all time (EA MMA and UFC Undisputed 3 are arguably better). But even with all of its polish that has come from the last eight months of updates, some really weird stuff happens inside the digital Octagon.
We've seen fighters float off the ground and freak out, seemingly possessed by the devil, but those bugs usually just lead to gamers closing the application or reseting their system. Very rarely does a glitch end up delivering a massive KO.
Physics and the limitations of the human body mean nothing when you want the knockout bad enough.