I believe marijuana is a shamanistic drug. Anyone interested in astral travel check out the book, Astral Travel for Beginners. Astral Travel is a skill you can develop with practice. The two most important things if you want to do it are, don't give up, and try different methods.

Astral Travel is completely safe, no one has ever died doing it. Your astral self is connected to your body by an unbreakable silver cord.

I would talk more about it, but you might think I am crazy....