As Larry strikes the marble worktop with the cooking knife during the wrap rage scene real sparks are visible.
Larry remarks that receiving oral sex in the car is dangerous and there ought to be a law against it. Yet in AAMCO (2000), Larry wins a bet for which Cheryl has to give him oral sex in the car. Larry, however, is not drinking in the scene.
Larry's extreme anger at being unable to open the packaging is a well documented feeling, known as wrap rage. Supposedly thousands of people every year are injured because of it.