Sean Penn stars in Bad Boys (gee, isn't that a bit redundant?) He plays an incorrigible teen-aged gang member who is thrown into prison with several of his fellow unregenerates. Unlike Mr. Penn's real-life jail terms, this one is of significant enough duration to allow Penn to become Leader of the Block. His leadership is challenged when an old enemy, arrested after raping Penn's girl (Ally Sheedy), ends up in the same cell. Extremely violent, Bad Boys manages to remain compelling--and disturbing--despite its 123 minute length.