n German automakers Audi and BMW got into an infamous billboard war in Santa Monica, Calif. Audi set up a billboard for its with the words, "Your move, BMW." Sure enough, BMW responded with a picture of its and the "Checkmate.
A few years back, New York ad agency JWT came up with this brilliantly creative campaign for razor company Schick. To illustrate "the power of four," they created a razor so sharp, it even shaves the hair off tattoos! Clever and creative.