The Bedroom Killer
I used to watch this film when I was little and laugh my head off all the way through it. I didn't really feel comfortable, or know what was going on in the more sexual scenes... but the laughter would soon end when I knew the 'Bedroom Killer' scene was coming up!
I don't know what it was, but he scared me more than most things did at that time. I was like 6 years old, and he scared the hell out of me. Him and Salem's Lot!