Quote Originally Posted by wolfboy View Post
My girlfriend offered a possible explanation for this: we've never seen Peter use more than one power at a time. Since he was already (involuntarily) using the nuke power, he couldn't fly at the same time. It sounds plausible to me.
That would help give a limit to an otherwise amazing power that Peter has, and also gives Sylar a slight advantage in the power struggle between the two. That is a very good observation.