Older movie, It is about a goth nerd and a group of jocks. Both go to a party fight breaks out. Jocks go and push him in a pool, it turns out empty and the nerd is dead middle finger oddly pointing at his killers. His brain later gets replaced by a sadistic killer. With his new body he goes to a costume party. Jocks at fault kill him with guillotine and with head roles his middle finger goes up once more. Does anyone know this movie?
