When a man is about to finish making love to a womans ear, and realizes that he may have earwax on the edge of his penis. This thought causes him to pull out impulsively and unload man juice all over his girlfriend's face. Naturally still disgusted by the earwax left on his penis, he then proceeds to wipe the brown sticky material above the load he just blew, creating what appears similar to a black man wearing a white trench coat.
Ford: I totally freaked out when I saw the earwax on my dick man.
Sam: What did you do?
Ford: I had to give him a Seattle Salsbury Trenchcoat dude.