Mississippi Flashlight
Before a guy gives someone a cum facial, he tells the other party to close their eyes and says "OPEN" when he is about to ejaculate. Therefore, when the person opens their eyes, they get a big flash of semen.
Robbie: Cole, I so gave this girl a Mississippi Flashlight last night. She was like a deer in headlights when i told her to open her eyes.
Cole: She didn't see it cumming?
Cole: She didn't see it cumming?