Men In Black:
- "It just be rainin' black people in New York!", said by Edwards as he drops onto a tour bus, ad-libbed by Will Smith.
- Another Will Smith ad-lib made it into the sequel, when Agent J first shows Agent K the car's new "autopilot," a life-sized human model that pops out of the steering column;
Agent K: Does this come standard?
Agent J: Actually, it came with a black dude, but he kept getting pulled over.
- Almost all of Tommy Lee Jones' lines in the first film were ad-libbed. Jones hated his character's lines, so he made up his own. Will Smith is genuinely confused half the time.