I think the scariest moment I had in a movie theatre wasn't even for a movie, per se. But rather, for the trailer of one... Fly II. The reason it scared the crap out of me (and the rest of the audiance) was because you didn't see anything. It was all done like a horror radio play... and it was the sound of Geena Davis' character giving birth to Brundle's baby in the O.R., and something goes horiibly, horribly wrong...
Number Two: Conform, Number Six! Conform!
Number Six: I will not be stamped, filed, indexed, briefed, debriefed, or numbered! I am a person.