i had this happen once, it froze turned on and finally died. it wouldnt restart when charging off the wall but i plugged it in at home via firewire and she started back up. I did this with the help of an apple tech and an extended warranty. he had me upgrade the firmware and a problem that i had recurring issues with (this one) has not come back. i use the ipod velcro'd to the side of my scooter without a problem...but running it skips sometime.