Gas Gang Chloroform, Carbon Monoxide, and Carbon Dioxide. Whereas the Metal Men were approximately the same size as Doctor Magnus, the Gas Gang were anywhere from one-third to twice his size. On Chloroform's initial attack, it caused the Metal Men to break out in fits of hysteria ala Nitrous Oxide (Laughing Gas) which Doc Magnus said was chloroform's initial effect. Before Lead could wall them off, Mercury literally "broke up laughing", opening Oxygen to attack and causing the Metal Men to begin to rust. During the chase Carbon Monoxide (called "CM" by Carbon Dioxide) attempted to poison them with fumes, while Carbon
Halabja chemical attack "died of laughing," while still others took a few minutes to die, first "burning and blistering" or coughing up green vomit. Many were injured or perished in the panic that followed the attack, especially those who were blinded by the chemicals. "Iranian physicians reported that victims of the chemical attacks on Halabja showed characteristic symptoms of cyanide poisoning," while other reports indicated substantial quantities of mustard gas and other chemical weapons were used. Most of the wounded taken to hospitals in the Iranian capital Tehran were suffering from mustard gas exposure. A United Nations (UN) medical investigation concluded that mustard