True story:
Although anyone using a commercial strength insecticide containing a nerve agent must wear a mask, a patient had long, frequent seizures due to an overactive nervous system. He made frequent temporary recoveries after just a few minutes of inhaling fumes from such an insecticide airborne from the apparently dry sprayer of the bottle, 10 ft away, (brought by a patient sick from the fumes). Even though the insecticide fumes were too low to noticeably effect someone else in the same room, the low concentration was still enough to calm the patient's nervous system. Incredible (true) story, amirite?