Something to watch. It's an hour long documentary, made in 1994, about the link between MDMA and dance music.
For "those that know", in the UK, it's highly regarded. Although I've rewatched several times, I'd forgotten Burning Man gets a reference. Not worth trying to skip-view to find that, just watch the whole thing if you have time. Expect science, Orbital, and strange people in a desert. http://www.youtube.com/watch?v=ACraqnQoIsg