Ruining the take

Considering there are lasers flying everywhere, it's not hard to believe some of the actors really got into the sci-fi element of the movie.

In fact, Tommy Lee Jones would frequently ruin takes by making laser gun noises, much to the annoyance of the director.

Even so, the actor insisted he was unaware of making such noises, but always managed to get Will Smith to crack up whenever he started doing it.