dude just go buy some pot.... At least there are studies that say pot has no long term effect. If you are worried about pot being illegal then go buy some salvia divinorum 20X that should send you tripping into the night for about 15 mins per bowl, plus its 100% legal in most states for now.... lol
Here is the Wikipedia link for it Just don't get the normal stuff, you have to get like the 20x or better if you want to trip good. I bought 4oz of the non concentrated leaves and it didn't do me any good until I smoked like 6 or 7 bong loads to my head( This was hard because the leaves taste like chit), but when I smoked 20x I was laughing my *** off for the first 5 mins ( didn't even put the bong down yet and I was laughing...) then the other 10 i was trying to figure out whats going on... Its a nice trip, just be careful and do it somewhere safe the first time, and have a sitter.