US comedian Andy Kaufman (cleverly played by Jim Carrey) , best known in Britain for his portrayal of geeky Latka in the TV sitcom Taxi, was a loose cannon in real life. You just never knew when he was joking. As this sometimes funny, sometimes disturbing but excellent biopic skilfully shows us, that was both his attraction and undoing. Once described as the 'king of negative energy', Kaufman is a difficult butterfly to pin down, but Carrey and director Milos Forman do a marvellous job.