The original Exorcist w/Linda Blair. I watched in at a cousin's house alone in a dark basement ( converted to a family room ). I remember that I wouldn't even get off of the sofa to call anyone downstairs because I was afraid that the devil would "get me". I was 16 or so.
We had some adult friends who lived in the country when that movie came out. They landed up having to move to town to an apartment, freaked out the wife so bad. She wouldn't walk under an attic fan after seeing it.
I slept with the lights on for a year after seeing it, and LOL...I didn't really even see it. I sat thru all but the first 5 minutes with my head down. But the sounds were bad enough.
Becky