Parasita

No, this is not a very good movie at all. However, I saw it when it was first released in 1982 in 3D, and not once since then, and I still remember some creepy scenes. The big gross-out in the movie -- when the dripping parasite falls down on you from the ceiling in 3D!! -- had me squirming in my seat in 1982.

I saw a number of films during the short-lived 3D revival of the early '80's, and, believe me, there were very few kick-ass uses of the 3D effect anywhere, but Parasite had one of the better ones. (Most of the other good 3D moments are in House of Wax with Vincent Price. Even Hitchcock couldn't figure out what to do with the gimmick.)

By the way, in 1982 no one had ever heard of Demi Moore. Did we predict big things for her after seeing her in this? Yeah, right.