Horror Trip
When something so terrifying scares the living hell out of you, even after the experience you are still in shock for a long period of time.
Guy1: I was walking home one night when I saw a hobo with a mask across the street. He started following me the way home, and when I looked back behind me, he wasn't there. I was paranoid the whole way home that even a car passing by me scared the balls out of me.
Guy2: Dude, that's one bad Horror trip.
Guy2: Dude, that's one bad Horror trip.