I agree with Stan wanting his money back for The Passion, but..
Gibson and the ticket guy were both right -they sat through the entire movie. They could have left at any time during the beginning, which was likely just as appallingly bad as the rest of the film, yet they didn’t. They sat there for two hours and never once thought to leave. While the movie sucked and they had every right to be angry over that, they had absolutely no leg to stand on when it came to desiring a refund. Not only that, but they took the money from Gibson - who was in a fragile mental state - without his consent. They had the right to complain about the film, they had the right to feel ripped off, but sitting through the entire thing was their dumb choice and they would have probably got the refund they were entitled to if they’d just left much sooner.
I know this is part of the joke, but it does make me wonder where they got off on claiming they’d been ripped off by not getting a refund when their own actions prevented it.