The invention of lying. The most irritating movie with an interesting concept that they screwed to hell. I was with a group of 5 other people, they were having a blast but I just walked out after 20 mins and got a refund. 5 mins later my friends turn up saying they had had enough of the same jokes over and over but they couldn't get a refund because "refunds will only be given 30 mins after the session start time".