Get your significant other in the yoga position, 'Downward Facing Dog', while you are standing up, grab her thighs to where they are now up by your hips, and she is on her hands facing down, similar to a handstand, rest your male member on the rim of her anus and pull up on her thighs as you thrust downward (extremely hard), forcing an air pocket into her rectum, which when done correctly will produce an immediate, thunderous release sounding much like a bomb.
Hey man, why did you and your girlfriend break up?" ..."Well, I gave her the Vertical Salami Bomb
last night." ..."ouch