You shouldn't take someone's seat.
Jack gets into the waiting room at the DMV and it is very busy.
Jack wants to sit down but it looks like most seats are taken.
Jack stays standing and waits until a seat frees up.
Jack sits down in a seat next to a child with a backpack in front of it.
Jack's legs get tired but no one gets mad.
Jack stole someone's seat and when they get back, they are mad.