Classic horror film, to me, still means THE INNOCENTS with Deborah Kerr.
There was some warning from space movie from the 50s about these kids at Cape Canaveral who discovered this throbbing creature.......... wait maybe that was a different kind of movie..... no, no, it was called Cape Canaveral Monsters or something like that. I had nightmares for weeks with that one I could never figure out what was supposed to be scary about James Arness in THE THING.