It's clever. Robert Downey Jr's good. I hate most of the actors in it but it was so well-made and the movie parodies were great. It's probably the best thing any of those actors (Ben Stiller, Jack Black) will ever do. Not to mention that the little kid in it was amazing. I dunno. Held my interest just fine and it wasn't nearly as annoying as I would've thought. I consider that an achievement in its own right.
Anyway, finally got this on DVD after wearing the VHS out for the past 9 years..
MANIAC - 10/10