38. The Hoover Dam's Collapse
Movie: Superman (1978)
For most of director Richard Donner's superhero classic Superman, FX overseer Derek Meddings is at the top of his game, and, rightfully, the film won an Academy Award for its visuals. But, as the story goes, Meddings had to leave the production before its conclusion in order to work on the 1979 James Bond flick Moonraker, and when it came time to execute Superman's climactic destruction of the Hoover Dam, Meddings' expertise was gone. And the sequence ended up with a cracked bathtub degree of cheapness.