Continuity mistake: In the final scene when Oscar introduces Felix to his card playing buddies, watch carefully at the guy in the toupee. Between shots he has his sandwich in one hand and then hes reaching for it and then its just sitting there. This happens about three times.
Factual error: When Felix and Oscar are on the plane and Oscar goes to sit next to Felice, the pilot says they will be landing in twenty minutes. This cant be as the police sheriff said the flight would take forty minutes. I don't think Oscar was in the bathroom for twenty minutes or the seatbelt sign wasn't on for twenty minutes either.