Halloween Pussy Trap Kill Kill

"The Mastermind" is played by Dave Mustaine, who is the mastermind of legendary heavy metal band "Megadeth".

When Speed, Peter and Billy are being gassed, the Mastermind says that it is sarin gas that is being used. Even at low concentrations sarin gas can be fatal in as little as one minute and without the administration of an antidote will lead to death usually due to asphyxiation. No antidote is ever shown to be administered to any of the characters but they are fine with seeming no lasting effects as soon as the gas is ventilated. Clothing that is exposed to sarin gas can continue to expel the toxin for up to half an hour causing constant exposure, yet this does not seem to affect any of them either.

References Faster, Pussycat! Kill! Kill! (1965)