Don't think it was staged. If you remember, Ettienne pulled out of the fight just days before claiming that it would be suicide for him to step in the ring and the money wouldn't be worth it. Then he got pulled back into it for the money, got hit once, and he went down legitimately. You can tell by the way his ankle bent. You can't take a fall like that without being out of it. He probably could of got up, but Tyson was the baddest man on the planet as Etienne was growing up, he was scared to death. After the fight, when he went to hug Tyson, he told Tyson to stop bullshitting himself, that he didn't belong in the ring with Mike.

Definitely was not staged.