The American movie was my first exposure to Pippi Longstocking, since it came out when I was a kid. So no dubbing was required. Then at some later point I saw the tv series/movies made from the series. And a few weeks ago I watched the first episode of the animated series...
Slasher - Alien: The musical? Inspired by the diner scene from Spaceballs, perhaps?
And it's doubtful our ideas would clash unless yours are influenced by Are You Afraid of the Dark?, Goosebumps, The 90s Outer Limits, Spaced Invaders, Super 8, etc.