I was awake for the whole thing, and pretty interested throughout, and, i easily believed how it ended.
[spoiler]When i saw the bad agent walk into the room with the ice box and look around for the good agent, i knew the wrong person would get knocked in the box and something bad was going to happen “inside” the room. I didn’t think the walls would close in though.
So the bad agent will continue to play Jigsaw games–is that what i wasn’t supposed to believe? Lame![/spoiler]
The first Saw movie would have been better tagged “You Won’t Believe How It Ends.”