Massive heavyweights Alistair Overeem and Antonio Silva collided at UFC 156, and the result was unconsciousness.
After getting handled for two rounds by the former K-1 kickboxer Overeem, Silva turned the tables in Round 3, landing a series of crushing blows that forced the referee to intervene. Watch the fight transpire in the video above.
Silva will face Mark Hunt in a rematch of their incredible 2013 encounter – which ended in a draw – Saturday, Nov. 15 at UFC 193 in Melbourne, Australia.