Um, yeah, tried a psychoactive drug ONCE when I was 15/16? (Got all of my partying done before college apparently.) I mentioned alcohol and pacing self but there is absolutely no way I could have read during or after that Acid experience. I am actually allergic to something (not sure exactly what-but am also allergic to milk-weed types of plants) in Marijuana so I haven't tried that in a long time. My husband smoked something years ago - something that sent him on a trip for what, in reality was about 1-2min, he was Gone during that time and had a whole story after but since he was Gone anything put in front of him he wasn't seeing anyway. So it really depends on the "what" you're doing and like many others have said the training you've had.