i hate the fact that im good at predicting what happens in movies, sucks the fun out of everything.
ok, in the trailer at the very end we saw harry osborne juuust pull off the mask and then of course, they cut to black.
but then in one of the teasers they show like a one second clip of him backing up from that spot (u know its that same scene because he has that same outfit its the same room he's holding that knife or whatever, etc.) with an incredible shocked look on his face (great actors in this movie). that pretty much gives it away, he finds out.
i guess it doesn't really, because u knew he'd find out, they just didn't show you the exact moment, and the people who put this together know that we predict these kinds of things, but they build it up so much that it still teases us, y' know?