I'm curious to know the physiological mechanics behind a "crackheads" uncontrollable akward movements. Is this from the crack per se or sleep deprivation? My experience generally after a day or two binge. Unusual mouth and facial positioning, swaying, can't sit long, need more, more, more! My only other drug of choice has been PCP which has kept me up but not stimulated as much as simply anesthesized so I have no other experience being up days at a time. Are these tweaks do to the drug itself or sleep deprivation?