Steve Reich, Eat Your Heart Out
Inspired by foxen_alopex 's recent post, I give you Girugamesh Minimalism.
Step 1) Open multiple copies of this video, as many as you dare:
http://www.youtube.com/watch?v=5iF-xL_Xz3M&NR=1
Step 2) Set them off at different times
Step 3) Enjoy (I've been playing with the phase for over 20 minutes now).