When a man is fucking a woman in the ass and suddenly scalps her saying: "Welcome to your nightmare", and then continues to cum in her open scalp.
When you do this, remember to dispose of the body!
Jim: "Hey how was it with Melissa last night."
Bob: "Awesome, I was giving it to her in the butt when i decided to give her the old Freddy Krueger."
Jim: "Dude, that is actually demented."
Bob: "Don't worry Jim, I disposed of the body."