a.k.a., Madame Psychosis
…like LSD that has itself dropped LSD…
Ed. note: DMZ is a fictional hallucinogen
Ultimate fate of the DMZ in the story? Not explicit? Believed: Hal obtains it (somehow) from Pemulis, takes it, and it causes a psychic meltdown of some form or another (hence the business with everyone misinterpretting his facial expressions and tone of voice).