Will have to agree with Purple Root on this one. There are a bunch of ways to tell if somebody has been toking. Eye lid flutter, blood pressure and pulse will be up, blood shot eyes, green tongue, dry mouth to name but a few. One of the tests the cops use is have the alleged perp shut their eyes and guess when 30 seconds have passed. Somebody who is really zonked might stand there for 30 minutes waiting for the 30 seconds to pass. Pupil diameter is not a clue because the pupils will react normally. Now Ecstasy will really jack with the pupils. Makes them about the size of a nickle and they stay that way. PCP can swing either way. Either stuck in the dilated or constricted position.

Goob