Think I'll go person by person.
Storm we seem to agree in almost every department, except that a clone has no reason to look like Sephiroth.
Big D, that theory is in my opinion the second most likely. All I have to say is that the guard not being damaged as much can be explained much easier by simply Cloud killing him, and I think the timing is much better explained by Cloud. As for hearing, well given there's no sound we could all decide different ways sound could work in the cells to fit our theories.
Other than the needing Sephiroth's help, I'd follow this theory, if I didn't think Cloud explained things with less coincidence.
.......Raistlin. Although I think Storm explained all your points a few minutes before you posted, I take your edit to mean you stand by your arguements.
Jenova- the timing is insane, the door is pointless.
Hojo- believing Hojo did it requires so much imagination I'm not even gonna try.
Cloud. Getting out of the cell has to be explained no matter what, this theory EXPLAINS it.
Cloud opening the tank requires no real thought, he's basically as strong as Seph, and if under Jenova's control...
Cloud was asleep, do you ever watch Cloud sleep? The only time you don't watch Cloud is when he isn't in control of himself. You don't watch anyone after Disc two for a while, because nothing happens, and the designers didn't want you to know.
Edit: Okay Big D I was too tempted by that challenge so I checked back. Other than Sephiroth helping (which is the point of the thread really, and I've tried to stop this becoming about the tank again), why would the guard crawl to Cloud(if I remember the layout right), turn around and crawl back towards Jenova?
