Don't get trapped in the toilet

I'm a sucker for a good ad campaign that uses an unusual medium. Say for instance, the back of a bathroom stall.

Essentially, a giant sticker is placed on the inside of the stall door to make it look like you're trapped (i.e., a brick wall). A poster with the headline "Don't feel trapped in the toilet" is posted on the wall. In other words, eat bran and you can poo. No brick walls.