Mean Character Nice Actor: Sharon Stone had considerable problems filming the opening scene in which Catherine murders Boz. To the point where a paramedic needed to be on hand because she kept fainting during the sequence and suffered from nightmares afterwards.
Actors Michael Douglas and Jeanne Tripplehorn were merely rehearsing the sex scene between their characters and didn't even know they were being filmed, but the director liked the footage so much that he put it into the film.
As well as the infamous pantyless shot. Paul Verhoeven recalled a woman doing this to him years before to embarrass him and decided to put something similar in the film—it was never in the original script.