The Britons can make anyone laugh. This movie, "Submarine", however, is more of an American movie where people speak with an English accent. This could partially be explained by the disclaimer "Ben Stiller Presents" on top of the movie box. If he had as much to do in this one as he had with "Greenberg" then I am not surprised.
I guess you could watch this one, a movie about selfish boy who finds happiness in the end. Why not, right?