The episode of 999 where the woman slips in the bathroom and is in a chokehold with the door and the frame. She's alone in the house and stuck like that for ages because she is wedged in a way, where if she moves the door will close in on her neck. That was the one that really scared the crap out of me.
I remember another, where a person ends up impaled on railings after they open a window and fall out.
Me and my sister would often scare ourselves shitless with our parents VHSs...
Creepshow. Looking back it seems to be a spoof. But Meteor shit never sit comfortably with me, nor did that chap who really wanted his cake.
Another one springs to mind. I used to scream at blown up gloves, I probably wouldn't have remembered but my parents kept mocking me for it growing up.