Mars Attacks! (1996)
Tim Burton's surreal B movie parody features classic big-brained aliens on a mission to take over the world. Their weird laugh (made by reversing a duck's quack) and mad stare make for a hilarious enemy: terrorising cities while holding a translator spouting "we come in peace". The film features a massive ensemble cast, including Jack Nicholson (twice) and an early appearance by Natalie Portman – though it's Tom Jones who steals the show with his campy escape from Las Vegas.