You shouldn't expect people to wait for you.
Jonny is late meeting up with his friends who are at the movie theater.
Jonny wants to watch a new movie with friends.
Jonny tells his friends to start the movie without him and save him a seat.
Jonny tells his friends to wait even though he is significantly late.
Jonny's friends enjoy good seats and are able to save one for him as well.
Jonny's friends are disappointed that they miss the beginning of the movie.