Michigan Slip and Slide
When one is making violent love to his friend's mom's anus and she grotesquely defecates and the defecation then induces heavy vomiting in the male which in turn causes even heavier vomiting in the mother. Once sufficient vomit and excrement has been accumulated and a near-frictionless surface is created, the mother is to slip on the excrement-vomit solution and hit an object that leads to a state of unconsciousness.
John: Oh my God, Mrs. Smith you've created a Michigan Slip and Slide in the kitchen!