I have seen people smoke up weed and go into dazed zones and worlds of their own. I know things slow down and you enter your own space with your own thoughts, good or bad. But there is someone very close to me who goes into almost hysterical laughter every time he smokes up. This isn't the happy or peaceful laugh that apparently comes with getting high, but some sort of nervous jitters that make him laugh and talk uncontrollably. It's almost dark compulsive laughter, and he doesn't seem much like himself during that time. Have you seen this sort of behavior in anyone when stoned?