Roadkill

BANG!
"Jesus Christ, what was that?" said Alan.
"I dunno," said Mark.
"I hit something, but I didn't see anything."
"Me neither."
"Well?"
"Well what?"
"Are you going to get out of the car and have a look?"
"It's your car, you get out."
"Yeah but—"
"But what?"
"It's pitch black out there and we're in the middle of nowhere."
"You're scared of the dark?"
"No. Well... yes, I am."
"Alright, stay there, I'll have a look."
Mark gets out of the car.
10 minutes pass.
Alan's trepidation increases.
BANG! - Mark's decapitated head slams into the windscreen.
"Sheeeeeit!" shouts Alan.