The Russians were reported to have used succiny chlorine on Israeli prisoners in Syra, 1973. The drug, administred by injection, causes convulsive muscular spasms, leaving the victim totally paralised, in agonising pain, unable to breathe properly, but concious. The victim himself dying for lack of oxygen, although the effict is transitory, but there is then the threat of a repeat experience.
Well kiddies this is reality.