I've heard of a lightweight before but DAMN!
Heh well I suppose it's understandable. If you go into the experiment with all these predetermined notions, with a drug so dependent on set, it's no surprise you freak out some (or, in this case, a whole freakin' lot).
Watching the documentary right now; it's pretty hokey and what-not but kind of entertaining too. I really liked the driving test "When stoned she was more cautious, and since her perception of risk didn't measure up to reality, more harmful." Haven't you ever heard "always drive as if the car in front and behind you is controlled by a lunatic"? First time I've ever heard a driver instructor talk about being too cautious.