This movie scared the crap out of me when I first saw it opening night. The Cine Capri in Phoenix finally stopped showing Star Wars and this was something new, and definitely different from Luke Skywalker & Co.
Driving home, I kept looking in my rear view mirror because I expected it to pop up in the bed of my truck at any time.
The only other films to affect me this way were Poltergeist (I slept with the closet light on with door open for a week afterward) and Aliens (I came home, opened every door, and turned on every light in the damn apartment.)