Iron Man returns in this action packed and for the most part hugely entertaining sequel.Downey JNR is once again on good form as Tony Stark and there are fun new inclusions to the cast list including Sam Rockwell and Mickey Rourke.Rockwell very nearly steals the film from under Downey Jnrs nose delivering a highly enjoyable performance as a kind of Tony Stark wannabe.Mickey Rourke plays a Russian baddie but the director does a good job with his actors and never allows Rourke to become panto or over emphasised,he's just a brooding menace. The film does have it's shortcomings though.Like the first film,it does go all Transformers towards the end and it doesn't take long for CGI to bore but the chemistry of the cast and the fun being had does go a long way to paper over those particular cracks. Scarlet Johansson is introduced for no other reason than she looks great in a tight leather outfit. Gwyneth Paltrow also turns up without offering much more. Don Cheadle replaced Terrence Howard as Col Rhodes which is a shame for the continuity but on the whole the film fizzes with fun and thus delivers the very thing its target audience pay for.