I had my first road hazard flat in probably 2 years this morning. The gravel road I ride 4 miles on every day had a couple of 100 foot stretches where the frost was breaking, so it was very swampy there. So the county came along and dumped a load of this horrible 3-5cm crushed rock down. It's huge, it's sharp-edged, and it's unavoidable. This was the 3rd time riding over it, and it finally got me; I went flat in a couple of seconds after clearing that minefield.

So I got to practice changing tires in the dark. And realized that I haven't used the Topeak pump since 3 or so years ago when I was using Presta valves, and had to pick the little rubber gasket out with my fingernails to flip it to Schrader. All told, about 12 minutes, due to the 3 minutes it took to get that pump switched over, and having to dig for the tire levers since I haven't changed a flat in so long.