Multiple personality disorder is a rare and misunderstood mental condition. Sometimes, a patient's MPD can turn ugly. In some exceedingly rare circumstances one personality can turn on another, creating such cognitive dissonance within the patient that recovery becomes nearly impossible. Please note the case of Acidburp vs Rat-Faced Boy. In this study, patient A, herein referred to as Acidburp - a normal English man in his early 30s - began showing signs of a second personality, who referred to himself as Rat-Faced Boy. While early treatments showed signs of the Acidburp personality maintaining a dominant role in the patient's psychology, when heavy doses of acid were administered through the aural pathways, CAT scans showed that Rat-Faced Boy's prominence began to grow within certain areas of the brain. Repeated tests involving various doses of acid all yielded similar results and the conclusion was drawn that in select cases personalities could be called up and controlled with some reliability. For now, the Acidburp/Rat-Faced Boy personalities remain compartmentalized within the mind of the patient, but concerns have been made by many medical officials that further testing could result in a complete collapse of cognitive function.