Scariest dream I've had yet

Date: 3/20/2017

It was noon and I was walking along a sidewalk next to a lot of stores with the street to my left and there was a break in the buildings to let cars through. Well, I was walking and a car pulled up with a woman in it singing with the windows up and this guy in a black trench coat out of nowhere comes up and shoots her with a nail gun. Like, 7/8 times it was just so bizarre and I woke up after that in a sweat.