If you can imagine such a thing as "Henry: Portrait of a Serial Killer" dressed up in art house haute couture and staged as a drolly surrealistic comedy of murders, then you have an idea of what's up in "Man Bites Dog." Directed by Remy Belvaux, Andre Bonzel and Benoit Poelvoorde -- a trio of Belgians who also wrote, shot, produced and play star roles -- the film is a mock documentary about the making of a cinema verite documentary about an extremely sociable psychopathic rapist, murderer and thief.