#5. Jurassic Park: A Seat Belt Malfunction Reveals That the Dinosaurs Can Reproduce
[P]aleontologist Dr. Sam Neill discovers that the dinosaurs are breeding despite the fact that they were genetically engineered to all be female (specifically to prevent this). It is a development that, indeed, no one saw coming, for how in the name of science could a bunch of prehistoric lizards equipped with nothing but girl parts be expected to make babies?
However, if you were paying close attention, it’s a twist the movie gives away in the first 20 minutes.