Watch Out, We're Mad! (Italian: ...altrimenti ci arrabbiamo!) is a 1974 Italian-Spanish action comedy film, directed by Marcello Fondato and starring the film duo of Terence Hill and Bud Spencer. It was a co-production between Italy and Spain.

In the film, two rival race car drivers win shared ownership over a dune buggy in a race. When the buggy is wrecked due to the indirect orders of a profiteer, they demand a replacement buggy. When their opponent decides to send a henchman against them, their argument escalates into violent conflict.