Now this works only on firmware 2.x. Open up iPod/ Music. Click the sleep/wake button. The next step should be done as fast as possible. Click the HOME BUTTON ( NOT THE SLEEP WAKE BUTTON) and move slider as fast as possible. The result, it will quit the iPod/Music app. This happens woth all the apps on device. Note- Nothing might happen if u arent fast with the pressing of home button and sliding the slider.