Holding/pressing the UNLOCK button on your key will open all doors, open all windows, sunroof, etc.. However, if you are holding the button (pressing it not knowing) and let the button go, the windows wont continue to open, they stop.

I am also lucky (Australia keys must be programmed this way, i think I read US keys arent.. could be wrong) that by pushing the LOCK button continuously, will close all windows, Sunroof and lock the car.