I saw this film while I was being babysat
I saw this film back in the early 80's - Coincidentally I was being babysat, I had only seen the first 10 minutes cos my babysitter was scared out of her mind & she turned it off up to the moment when the cop was standing at the door...
I couldn't sleep or pick up the phone for weeks & apparently the frightening babysitter never babysitted again after that night...
This is how powerful & effective the horror films was back in 70's & 80's, unlike today...