You can't see it very well, but all the metal around the plug is corroded and crumbling away.
I started my 20 mile run (man, I like saying that) using a cheap-o iPod knock-off that Mom had scored free at an animal conference. And it died at mile 4. So the remaining 16 miles were all in my head. You can't even imagine the things I thought about and decided...that is too much time to think!
But I ordered a refurbished shuffle online... I hope it gets here soon!