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Old 01-09-2017, 02:58 PM
Scarecrow's Brain Scarecrow's Brain is offline
Join Date: Aug 2015
Posts: 16
"Knock out gas" pumped into the ventilation system. I came across this most recently playing Grand Theft Auto V, but I've seen this in TV shows and other media.

It turns out there's a reason anesthesiologists exist. Too little anesthesia and you won't be unconscious, too much and you'll be dead. Tolerances vary from person to person.

For a real-life version of this trope with real-life consequences, read about the 2002 Moscow Hostage Crisis. (Short summary: Russian Spetnaz units pumped an unknown sedative into the theater and 140 hostages died from adverse affects of the gas.)