i think this is all pretty funny. you people dont know much about muscle fiber types, how they work, their ability or inability to act like other types, and the energy systems of the body. i'll give him sub 6, but no way in hell he runs sub 5. his muscles would tighten up so fast and when that much muscle tightens up, no way in hell does he keep stride enough to finish in sub 5. He would have the choppiest, funniest looking stride from about 500 on out, assuming he was running 75s. (you know, like he's got a stick up his ass heading straight through his bald oversized head.) Oh yeah, another point, the type of steroids he was on (and we all know he was on them) actually deter against the ability for the body to use oxygen efficiently.