Cyclocross race (Romp in the Swamp) 1:08:00 
Cold, wet and muddy. I burped my rear tire on something buried in a mud pit and had to run a full lap back to the pit. The only wheels I had in the pit were my file treads and they didn't work at all. If I put more than light pressure on the pedals my back end would slip out and fishtail like crazy. Between the run and the slippery last lap I lost a ton of places.