When you are doing a girl doggy style (more points if its anal) and she is so tired that her arms have given up and she is laying facedown into the pillow. Just as you are about to ejaculate you grab both arms under the elbows, pull her back in an arcing fashion and in conjustion with your convulsion yell "KACK-KACK-KACK-KACK-KACK-KACK". Akin to Cuba Gooding Jr. in Pearl Harbor
Ian: So Matt, did you and Veronica get it on last night?
Matt: Shit man, I shot down charlies left and right while I was manning the guns