In fact, I used to argue with my professor, Richard Evan Shultes -- who is a man who sparked the psychedelic era with his discovery of the magic mushrooms in Mexico in the 1930s -- I used to argue that you couldn't classify these tryptamines as hallucinogenic because by the time you're under the effects there's no one home anymore to experience a hallucination. (Laughter) But the thing about tryptamines is they cannot be taken orally because they're denatured by an enzyme found naturally in the human gut called monoamine oxidase.