Heroin isn't that harmful itself, but the addiction is. I've dabbled with opiate painkillers a bit. I like them too much so I stay away.
Not sure if you guys know this, but dimethlytryptamine (DMT) is naturally occuring in almost all plants. And in your BRAIN!
Yep, when you dream, your body is secreting DMT from your pineal gland. (known as the third eye in some lizards)
Also its the chemical released that makes your life flash before your eyes before you die.
Btw Joe Rogan isn't a dumbass.
http://www.youtube.com/watch?v=grcqs9cDuN8
I had enough cannabis with DXM to produce a strange trip like experience last night. Some strange visuals, like a faceless grim reaper walking toward my friends and I. That was ****ing terrifying. The visuals only occured in total blackness however. And I fell asleep before all the DXM kicked in, dammit. It was fun playing "pretend" in the dark. My friend and I played "vietnam night patrol" and it was just as freaky.