That was actually the second crazy thing that happened on that trip. The first happened earlier while it was still light out. I was at a spot where a long country straight away was up above where I was fishing.
I heard a car go by really fast. Then I heard the tires scrr short pause scrrr long pause then scrrrrrrrrrrrrrrrrrrrrrrrrrr BOOM!!! The boom was so hard and close I felt it in the ground. A few mins go by and a cop car goes by then a fire truck then another fire truck. After a few more mins an ambulance with siren on goes by. A few more minutes later I saw that same ambulance leaving without sirens and not in a hurry.