Does anyone knows how did Sylar killed Nathan Petrelli?

hHello evrybody, In my point of view just before the explosion, Nathan fly far from his brother. He can fly very fast and his brother can heal himself. But wait and see the second season, I am sure we are very surprised.

Well here in the uk we have only just had the second to last episode from season 1, we have the finale yet to come which is aired tomorow night and i have been watching it since day one and it's getting better and better each week but i'm getting an impatiant bug now and i want to see the next episode and then season 2 but i want it nowwwwwwww lol. I'm not sure how nathan can be killed by sylar but the explanation above is a viable one in sylar changes to look like peter and then fakes himself blowing up then kills nathan in the air then the real peter eventually blows up anyway. It will be a shame for nathan to be killed off as i like him alot but i just wish it would hurry up, if only it were on tv every day that would be so much better.

I think what could happen if it were not prevented in the last episode of the Season 1, Sylar could have killed Nathan Petrelli by deceiving everybody that he was Peter Petrelli, and he knew that Nathan would never leave his brother in such a horrible situation.

It's Sylar in disguise...no doubt.