This is Maggot Brain by Fukadelic. Chords are Em, D, B, C over and over again.
I just played the whole thing twice and looped it so there's no fancy end to it.
I don't have the time to do the "wank" now, and frankly, I don't want to be first out.

backing track here: http://www.box.com/s/b6rgrgyvbi0er3ifanoy
Original song for inspirational purposes here: http://www.youtube.com/watch?v=dh3bleXWaCk

/Hampus

And yeah, I know. It's far from perfect...