During a movie within the movie, shown to be a student project by the main character, a man's head is chopped off (not bloody) and later it topples off his neck onto the ground. In another student scene filmed for a 'torture-porn' style movie directed by the lead character, a man tortures a chained-up young woman by pulling her teeth out with pliers--bloody closeup before the director yells cut.
A man picks up a large rat, then bites the rat's head off and bites into the rat's midsection and very sloppily and noisily eats the rat's guts (not much left to the imagination).
A young woman is attacked and dragged backwards by an unseen force, soon after some (but not a big amount) blood drips from her nose, ears, and eyelids.