They could get very abstract with a Poltergeist maze. There could be multiple appearances by the clown doll in which he is constantly in the background, and then towards the end, use the mirror trick (the Caretaker one). While they don't want to overuse the statue trick, a room full of clown dolls would freak a lot of people out. Also, walking the hallucination scene could be a hallway of rotting "meat" with the guy peeling his face off popping out.