A lot of people left my college's production of Into the Woods during the intermission. It wasn't because they thought it was bad; they thought the show ended with act I. It was because the playbill gave no information about the show, and the fact that act I ended "happily ever after" just added more to the confusion.
The tickets were only $5, so it's understandable that people didn't do any research beforehand on what they were going to watch.
"It's a goddamn beautiful day, shut up!"