Sentence: If you sit there and don't allow yourself to do anything that doesn't really have much purpose other than having done them, you're not going to have as much fun, and you're going to let a decent moviegoing experience to be ruined because you want to sit there like a stick in the mud because some people liked the movie and wanted to express it without turning to everyone else and saying HEY I REALLY LIKED THAT MOVIE WHAT ABOUT YOU EVEN THOUGH I DON'T
Combination: a stick in the mud (root: stick, modifier: mud)
Property: inflexible
Property type: emergent