One time I was riding on the Snohomish County Interurban trail, way up north in Everett. I was on a road bike with Vittoria Pavé tubulars, and my rear tire finally wore out and flatted (the tubes in those things give up the ghost at about 3000 miles.) I pulled my spare out from under the seat and put it on. I pumped it up and nothing. The spare had died just sitting there. :-p

Unfortunately, being deaf, I had no phone with me. It was a LONG walk home.