O ya.... theres a bunch of things that "give away" someones high. For example try a little experiement with your spouse/friend etc.... after smoking, and your feeling medicated relief, have someone stand up. Tell them to tilt there head back. After they have tilted their head back, tell them to close their eyes. When they close their eyes, you should be able to observe their eyelids to "flutter"- tell tale sign someone is under the influence of marijuana! Theres also the persons muscle tone, blood pressure, pulse, pupils that all display signs and symptoms of being intoxicated by marijuana. Its actually very interesting the effects drugs have on the human body.