when you are cumming in a girl's pussy and she randomly has her period and backfires your cum onto your cock, ruining a perfectly good and well earned orgasm.
Hey mom! I was about to get my bitch pregnant when she went all fire breathing manatee on my penis.
immmediately following ejaculation during oral sex, a man covers a womans mouth and punches her in the stomach, causing the ejaculate to be expelled through the nasal passage. it appears that she has magically transformed into a medieval beast. this is only to be performed by brave knights. (see also: smoking dragons breath)
"hey sean. what's that mess on the wall?" "oh that. last night i slayed a fire breathing dragon on the couch."