My dad took me to see Jurassic Park. I would have been 4. He thought it was going to be a Land of the Lost adventure type movie. I don't really remember it, but he said I spent the first half so bored I sat on the floor, and the second half so scared I sat on his lap and silently cried into his shirt. He bought me some candy and and that's the only way I was able to stay through the whole thing.
Then we saw Texas Chainsaw Massacre when I was 14. I had never seen that sort of violence in a movie before, and I got sick. I didn't vomit or anything, but I felt like I was going to and had to sit outside in the hall for a minute. We went to Taco Bell afterward and I couldn't eat anything.
Another is Titanic. I was 8. I guess it wasn't that bad for me, but I was bored and all of it went over my head. Don't know what my dad was thinking.