Usually nothing, but all your music could be erased, so it's not worth the risk.
When your iPod is hooked up to your computer, it and it is continually saying do not disconnect, then you just need to press the eject button under my computer or in iTunes. However, if it is not hooked up to your computer, there may be something seriously wrong with it.
yes just press the next button just like any other ipod
press the only button on the front
press down the center button and the menu button for 15 seconds and it migh tgo off before and it show the apple sign
press the synk button on your ipods name
press and hold the middle button and the menu button, at the same time, for +-10seconds, this will re-boot your ipod.
Press the home button
Press the home button and power button at the same time
Press the 'play' button until it shuts off.
you press the play/pause button
Press the home button twice.
Go to your camera and there will be a button at the bottom of the screen that has a camera and a recorder. Press the picture or button And when you have that press the red button at the bottom and boom