I heard this one when I was about 8 years old. I loudly announced to whoever was in earshot that when I learned to drive I would never, EVER get in my car without checking the back seat first. I’m proud to say I kept that promise to myself and I still haven’t been murdered yet. From UrbanLegendsOnline.com:
A young woman is sitting in a coffee house, about ready to leave, when a man approaches her and asks to buy her a cup of coffee. She politely refuses his offer, and tells the man that she’s had enough cups already, and that she’s going to leave. She walks out to her car, and drives away. Following her is the man who was refused on his coffee offer in his truck. She drives along a two-lane stretch of road, and sees the man following her in his truck flashing his lights and honking his horn. The woman is under the assumption that he is angered for her refusal of his offer.
After being followed for around 10 minutes with the man following her still flashing the lights and honking, the woman’s car runs out of gas. The man pulls behind her on the side of the road and gets out of the car with a double-barrel shotgun.
He tells her to get out of the car. She doesn’t at first, then he screams at her “GET OUT OF THE CAR LADY”, and she complies.
He then says “Get out of the car.” again. She tells him she’s already out.
He says “Not you, him”. He gestures to the vehicle and she sees a man wielding a butcher’s knife get out of the back of the car, holding his knife up in a surrendering style. The man tells the woman that he was flashing his lights and honking his horn so the man with the knife wouldn’t harm her.