Rear tire went flat

Last minute morning ride today put together by my buddy Parth - good company, good ride, er, except that my rear tire went flat about 10 miles into it. Bummer man. But in the spirit of preparation, I reached into my pack for my spare tube and nifty inflator, fixed the flat, and we were back in motion in just a few minutes. I guess it's good to get some "field practice" fixing flats in case it happens in a race.