National Lampoon's movies always have layers of comedy. There's the surface level gags like fart jokes and people falling over but underneath that there's always much more going on. It's always worth a second or third watch so you can pay less attention to the in-your-face jokes and more attention to what's going on in the background. Senior Trip is no exception. It looks completely stupid but there's a lot going on. It deserves at least 2 viewings.