[quote=Leonerdo]
No I don't. The adjustment of Mark's perception of time somehow provides super-speed and invulnerability? The power, as I am aware of it, is to slow down his perception of time while maintaining the speed of his usual thought process, yes? I don't see how that makes him invulnerable or grants his body super speed. The power relates to his perception and his brain procession, not other unrelated superhuman feats.
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That is the [i]development[/i] of his power: having control over your perception of time is the first stage. The second stage grants him the durability needed to actually move when time slows down, but only for very short bursts, and it would hurt like hell on earth and be very tiring. Stage three would make small uses off it completely painless, with bigger uses being able to be used for longer, but it would still hurt like hell on earth and be very tiring. Stage four would make extended use of very high speed not incredibly tiring at all, but still overdoing it would hurt like hell on earth. At stage five, he would turn to ash from inevitable overuse.