Well to be fair given how many times Robinson fought he may well have had fights that ended not unlike that, we wouldn't really know. Moreso though I think it's Ortiz headbutting that is quite rare in that level of prizefight, so you can't really say who would or wouldn't have retaliated that way.. Blatant headbutts are a serious foul and if you're going to do that against someone who prides themself on not taking punishment you should at the very least expect to defend yourself afterwards surely.. I will not give you a break, good day sir!