The first movie I ever saw was Popeye, in 1980, with Robin Williams. I cried my little eyes out. It’s not a scary movie, but I was expecting a cartoon, and seeing it with live actors freaked me right the fuck out.
I’m sure it wouldn’t scare me now, but I haven’t watched it since.
Sort of a similar thing with The 'Burbs with Tom Hanks 9 years later. Probably wouldn’t scare me, but nah.