Came across one today, absolutely disgraceful - most of us have heard of a dirty sanchez, and donkey punch, but how about "pink sock"?
Here's a link - you've been warned! http://www.thepinksock.com/the-pink-sock.php
While a girl is sucking you off, right as you are about to cum, you grab hold of her head and pull her mouth as far onto your cock as possible. She proceeds to gag from the cock unexpectedly being rammed down her throat, but since your cock is blocking her air passage, her cough (and your cum) exit through her nose. The cum dripping out of both of the girl’s nostrils, resembles a dragon’s snout - and after pulling a stunt like this, you can be sure she's going to be an angry one.