The "White Zone" differs from a "Blackout" in that an afflicted person never loses consciousness and has full, albeit torturous, recollection of the state after it has subsided.
Symptoms include crippling dizziness, complete loss of motor function, cold sweats, and inability to communicate. Since marijuana suppresses muscle function (including gag reflex) vomiting is not only guaranteed, but prolonged further than if only alcohol had been consumed.
(prolonged groan, spits apathetically into puke bucket)
"Did you double-wammy?"
"You've hit the white zone."