Pepsi once did a funny Halloween ad. In the picture, a Pepsi can dresses up as a Coke can to scare people. The headline was, “We wish you a scary Halloween!” That’s not a bad idea, but Coke got the last word. In a classic.
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.