A riot control agent is a non-lethal chemical used to disperse a riot. It can rapidly produce sensory irritation or disabling physical effects which disappear following termination of exposure. Examples include tear gases such as CS gas and CN gas as well as pepper spray.
... than all the wisdom of the
schools and lifts the mind to perceive more of
eternal truth in a moment of time than a student might
learn in the schools in ten years. ...