Guerrilla Advertising in New York for the Sopranos. This is a funny stunt which is extremely intriguing to a passerby who happens to see the arm hanging from the taxi boot. This encourages them to look at the sticker and see that the arm is fake.
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.