This advance level sexual manouver requires three participants(a good bro to fire the cannon). It is in which you climb into a cannon with your legs agape and once the cannon is fired, you must land precisely onto your partner's genitals.

Literally everyone, ever. Including the writer of this definition.

Receiving head and at the point of climax, the woman removes her mouth from the man's genitalia, pointing it at his face. If the man lacks the force to reach his face, he will climax on his own chest.

When you are having sex with a drunk girl from behind. While you are ramming it to her, she pukes and projectile vomits like shooting a cannon.