I really like this poster. The shadow of the hand and cigarette appears to be a hand holding a gun. It would look even better with smoke coming out of the cigarette, making it look like the gun was just fired.
An advertisement for waterproof bandaids. Simple ad that gets the point across immediately. We know that it is strong waterproof because the tear has gone out of its way to go around the bandaid almost like a magnet repelling it