I'm putting that condition on it because I believe that in order to be fully creeped out, the full sized screen, the megasound system, and being trapped in there with other people is
the way to get it done.
And if it gets to be too much, you can't hit the remote and take a break... you either have to man up and walk out... or man up and stay.
There are two for me... both of these infused me with a deep sense of dread and I was genuinely wondering if I could take it as the story unfolded.
I am not one to sit any further back than about the 5th to 8th row, either... IMO, you're a weenie of the first order if you sit near the back during a creature feature.
The Exorcist
A L I E N
In space, no one can hear you scream.