During the scene where Smith's Agent J and Jones' Agent K were driving upside down the Midtown tunnel, they had to be hermetically sealed into the fake car on set. That's when Smith accidentally let a fart rip while he and Jones were stuck inside.

Men in Black” director Barry Sonnenfeld appeared on the "Let's Talk Off Camera with Kelly Ripa" podcast and revealed the set of the 1997 action comedy once had to be evacuated “for about three hours” because Will Smith farted.