Then don’t tell him his teeth are his skeleton trying to get out of his body!
For myself, the transporter accident in Star Trek the Motion Picture freaked me out. That klaxon, the wailing noises they made. and I could SWEAR when i saw it, the patterns merged…but apparently not.
Pee-Wee’s Big Adventure. The evil clown sequences were bad enough, but Large Marge had me hiding behind a chair, much to the delight of my younger sister.
For my money, that’s the best jump scare in cinema history.
I don’t remember it being so bad. What scenes in particular do you think would be frightening for children? (Or are you thinking perhaps of the 1971 Gene Wilder version, which is called Willy Wonka and the Chocolate Factory? A lot of kids, myself, freaked out during the paddle boat scene.)
That’s the one.
Feh. Carrie’s hand emerging from the grave to clutch Sue’s arm as she’s laying flowers. I was in the back of the theater and the whole place levitated, me included.
Holy crap, yes!!! Right now remembering how high I levitated gave me a bit of a start.
It’s funny that now, in 2022, we’re so familiar with not just the trope, but the camera framing itself, that we wouldn’t be surprised at all. But I’m pretty sure I made a sharp squeaking sound in the theater when it happened. 
It still works on me even now, when I know it’s coming.
The “entire theater levitated” jump scare for me was the raptor jumping up at Lex in Jurassic Park.
Raptor in the generator room for me.
Head falling into the hole in the bottom of the boat in Jaws
Coraline is a horror movie for kids that grown people can enjoy. Not in the sense of “it’s fun for the whole family” which nearly always means it’s for kids and old folks but the rest of us have to play along, but it’s a real horror/fantasy movie slanted toward kids but good enough to be really enjoyable and fun-scary for the wider audience.
Don’t movie studios nowadays purposely try to get at least a PG rating, because they believe a G rating is bad for box office numbers? Because supposedly audiences assume G = “kid’s movie”, therefore adults won’t enjoy it, so they don’t go see it.
Yes, that is my understanding. In theory, the MPA has five ratings (G, PG, PG-13, R, and NC-17), but in practice, it might as well be only three. G pictures are relatively uncommon (even for kid/family films), for the reason you note, and NC-17 films are extremely rare, because many theaters won’t run them, and many media companies won’t accept ads for them.
Huh? You mean it’s NOT about submarines?
Sorry, what?? Please explain before my dirty mind gets the better of me 
Late 1970s, early 1980s, they decided that the coyote/roadrunner cartoons were too violent, so they started censoring the scenes where the coyote gets mangled.
Was the result a decline in the number of children growing up to become product liability lawyers?