It's rude to abandon a friend.
Derek and Brad are friends who have tickets to go to a movie tonight, but Brad received a call from a girl he's been dating.
Brad wants to go on the date with the new girl.
Brad goes to the movie with Derek as planned and schedules a date with the new girl the following night.
Brad calls Derek and pretends to have suddenly fallen ill, in order to get out of the movie.
Brad enjoys the movie with his friend and begins dating the new girl full time.
Brad loses Derek as a friend once Derek learns that Brad lied after seeing his Instagram out with the girl.