Heavy rain, then 2 miles into my ride, BANG!, and the back tire was gone. I walked home the 2 miles, changed everything to my MTB and back out into the rain, smelling like a wet dog. Mornings like this are bound to happen, if you ride regularly, but it is a good thing that they are rare me, especially in the morning darkness. It's always a pleasure to take the MTB out, as the ride is lower and hill climbing is much easier.