If the fact that he's a giant - his nickname is Bigfoot for crying out loud - doesn't sell you on how tough Antonio Silva is, then look no further than these three fights: One, the beatdown he took the first time he met Cain Velasquez in the octagon. Actually, either of the times he met Cain ended in a beatdown, but consider that after the first time, he still went back for more. Two, his comeback demolition of the Demolition Man, Alistair Overeem. Three, the vicious back and forth bout he had with Mark Hunt in December 2013, a fight considered by many to be the best heavyweight bout of all time. It officially ended as a draw that night, though Silva would later fail a drug test due to elevated testosterone levels.