Just a BTW, assuming the reset fixes your problem, I'm pretty sure it would have been caused by the iPod having to access the hard drive whilst being jerked around quite a bit. It happens to mine quite a bit because I go running with it all the time. There's a buffer to prevent this so it's fine so long as I let the iPod choose the tracks and I don't go playing random stuff as I'm running. This way it'll keep the buffer filled and it won't really have to access the hard drive. 🙂