I used to turn the garage into a cinema on a weekend, and show 8mm films to a bunch of other kids. There would be around a dozen of us most weekends. I showed mostly horror stuff, all was fine until one week I got "Plan 9 from outer space", Half way through the first reel there was a riot, with the threat if I didn't turn it off, or if I put any more of it on they would all walk out, never to return!
It has that effect on some