This has been bothering me for a while. At the end of the whole "Crap, just who am I exactly?" sequence, Cloud stabs Sephiroth. Then Seph trudges out into the reactor entrance. Cloud follows, gets at least 6 feet of solid steel straight through his chest, and gets lifted off the ground. How exactly does he manage to lower himself back down and then proceed to "toss" Sephiroth into the Lifestream, and survive the whole thing? And don't say, "but Sephiroth was weak from getting stabbed lol," because Seph was clearly much, much, much stronger than Cloud at the time. Which one do you think is going to retain more strength after they both receive gaping holes in their respective chests? And that still doesn't explain how what Cloud does is physically possible.