With some notable exceptions, any movie with an animated opening credits sequence should be avoided at all costs. An animated credits sequence only serves to make a promise that the filmmakers can’t help but betray. If any of the films below were even half as entertaining as their credits sequences they would be downright classics.
Here's a fun fact about Brain Donors: The film was originally entitled Lame Ducks. This is why there is such a strong duck motif during the opening credits.