QUOTE(themko @ Nov 8 2007, 12:53 PM)

If they get high enough the explosion should still be clearly seen from Kirby Plaza.

I think Peter just pushes Nathan away (maybe with super strength) and just hovers in place while he explodes...
i'm pretty sure peter either told nathan to let him go or he pushed him away. he probably told him, because nathan is haunted by the image of his burned self. this image probably haunts him because of the guilt he felt from letting him go (even though he told him). the burns are obviously from being too close to the explosion of peter.
peter not remembering though...that's got to be the haitian. peter must have been found by adam...somehow...must have got maury to find him. they hook up, adam explains himself, but then the haitian has to stop peter at some important moment and blocks his powers and takes his memory. taking memories would be killing brain cells, though, which peter could eventually heal from (remembers angela maybe). i'm pretty sure the haitian erased peter's memory though, because the haitian's necklace is gone in the second season, but peter suddenly has one.
i also think it's possible that the haitian erased sylar's powers, or sylar has the virus. since sylar can figure things out, see how they work, however, he somehow subconsciously figures out how to stay alive in spite of having the virus. as he figures the virus out, the virus figures him out...and Sylar is who creates the truly medicine resistant strain.
no that last part was bull but i do think the haitian might have had something to do with sylar's power loss. i mean seriously...lost it because he was stabbed? that's ridiculous.