My scariest movie moment happened at a drive-in theater in 1986. I was in a car with some friends, watching a new release called Aliens. Seen it?

We had no idea what the movie was about, so imagine our shock when a man eating a meal began choking and convulsing violently. I won’t describe the horrifying thing that happened next—just in case children are reading this—but we screamed in absolute terror.

In space, no one can hear you scream, but they sure heard us that night at the dr...