“Blue Iguana” (**1/2 out of four) was a generally uneven black comedy about a pair of dim-witted criminals (Sam Rockwell and Ben Schwartz) who are approached by a lawyer (Phoebe Cox) to take part in underworld crime but naturally things don’t go as planned and mayhem ensues. Funny and stylish at first but script has its ups-and-downs and eventually runs out of steam. Rockwell’s typically strong performance helps keep this watchable. Odd choice of soundtrack selections in certain violent scenes. Incidentally- this is not a remake of the 1988 Dylan McDermott melodrama of the same name