It was a beautiful sunny monday morning in San Francisco this morning. I cycled to work in t-shirt and shorts, but only as far as 6th and Folsom. Rear tire went flat, looks like some little nail punctured my Armadillo tire. Maybe I need a new tire as well as a new inner tube.
Update: Pulled an 1.25 inch rusty nail out of my tire. Flat fixed, fully mobile again.