Brain Dead (1990)

The sci-fi thriller Brain Dead (1990) stars Bill Pullman as a brain scientist who attempts to sell his revolutionary neural programming technique to his brother (Bill Paxton), who owns a large corporation and who may also be sleeping with Pullman’s wife (Patricia Charbonneau). Unfortunately the new brain treatment has the side effect of making people go crazy and see things that aren’t there. You’ll be doubting your own eyes when you see Patricia’s patootie as she straddles some guy on a bed.