Having a green screen and an expert in post-production can transport films to any setting, any time, without having to scout locations and building sets. They can even create massive fireballs and space battles. Unfortunately, CGI doesn’t always workout when transported to the big screen.

Some are just downright horrible that they deserve a mention on this list. Let’s start with:

The Shark from Deep Blue Sea (1999)

Jaws has always been the benchmark for shark movies since 1975, so Deep Blue Sea’s story of genetically modified sharks feels like classic thriller gold. But the visual effects department didn’t meet the expectations of execs and viewers.

Jaws relied on a mechanical shark, plus the fear induced by not seeing the shark until the end.

Deep Blue Sea shows off the sharks in all their chomping glory. When Samuel L Jackson gets surprised and chewed in a shark’s big, rubbery mouth, it just looks like the shark from Toy Story. One that picked a fight with Stretch Armstrong in an Amazon warehouse.