The bag
The bag... I knew about it beforehand 'cause people were talking about it on a forum, but I still felt nervous watching it squirm when I got to it. I probably would've dropped my controller if I hadn't known, though. xD
The best theory I've heard about the bag is that it was actually one of the Ganados' children. I believe that in the end credits, they show some of the Ganados eating and/or stuffing their kids into bags, so... *shrug* Maybe that was a kid who survived and was trying to escape, and we've all been shooting/nading him over and over again. Who knows?