Jerry took a woman back to his house, they were making out and he threw her on his bed, however she got up and ran of screaming. It only became apparent to jerry hours later that she had seen the Krunch on his bedding.
Similar to a pink sock, but better. While giving the girl anal the man punches the girl powerfully with both fists in both kidneys. AS she tenses up her anus, the man thrusts as hard as possible, causing her to fly off the man's cock. This inadvertantly causes the girl to pink sock herself.
'Did you pink sockthat bitch?'
'No man, I fuckin' kidney krunched that bitch so hard she's still bleeding.'