Garbage

"Eeeew, watch out!" the lady exclaimed. "Chewing gum on the seats!" She and her companion chose seats not having bits of chewing gum stuck to them, and proceeded to have lunch. He had a nice sandwich with crusty bread (lots of crumbs), she was enjoying a lo-cal box of blueberries. I returned to my reading.

When I got up to go, they were gone, but the empty plastic box from the blueberries was still on the seat. Next to the chewing gum.