Kate Beckinsale was once ordered by a director to strip off her clothes and shoot a nude scene. She was not amused. "It made me feel violated and horrible," she later recalled. "It involved nudity and all that stuff, which was dirtily handled." Her response? "I peed in his Thermos flask."
[Though Beckinsale never publicly named the director, it was almost certainly Whit Stillman, with whom she clashed on the set of Last Days of Disco.]