What scared you, disturbed you, made you hide in your parents' bed (after weeing in your own)?
Child snatchers, Grange Hill bullies, or John Pertwee as a sex crazed zombie scarecrow?
I saw Alien when I was 6 on the telly, and wasn't expecting the whole stomach business.
Also saw a public safety film, where six 1970s-style tearaways go play on a farm.
They all died, horribly (I think there was an even nastier one with paedophiles).