The Superfluous Chaperon

For some reason, I was a chaperon on a class trip for some young kids. I was supposed to help everyone board a school bus in front of my house, but there were lots of other chaperons already helping, and I didn't have anything to do. I noticed that the other chaperons had official IDs hanging around their necks, while I did not. Feeling out of place, I decided that the others had it covered, so I slipped away and into my house.