The Shadow in the Passenger Seat
While driving home one recent night, my wife found herself sandwiched between two large trucks. The truck behind her turned on its high beams, maybe to annoy or signal the truck in front because it was driving 10k under the speed limit. It was a dick move. Because she was driving a smaller vehicle between them, the intense light flooded her cabin and projected a clear silhouette of her outline onto the flat, white back of the truck ahead. She could see her outline very clearly, along with items on the dashboard.
As the three vehicles turned a corner, the angle of the high beams shifted and then shone through her car again. When the silhouette reappeared on the truck ahead, she noticed something changed: the shadow now clearly showed the shape of a tall male looking person sitting in her passenger seat, with the head and shoulders distinctly visible.
Confused and startled, she looked over at her empty passenger seat and then back at the shadow a couple of times to make sure she wasn't misseeing it. She immediately accelerated, pulled out, and overtook the front truck to get out from between them and escape the high beams.