Hi. I plugged in my

Question

Hi. I plugged in my iPod nano 4th generation to charge it. It opened iTunes as it usually does and I could see my iPod in my device list. I left it to charge as normal. I came back a while later and my iPod has seemed to have 'frozen' at the Connected..eject before disconnecting screen. I note that at the top of the ipod display the time has frozen also. Please help!! I can't turn the iPod off or acess any menus or anything - it's frozen!