No ride today - allergies kicked in in a big way last night and cost me half a night's sleep and half my vision...

Ride home last night was very nice, headwind and flat rear notwithstanding. How is that I can commute for 2 months with no flats, and then flat the rear (different tubes) 2 days in a row? I don't get it. Anyway, noticed it was flat as I pulled away from a stoplight, conveniently next to a little appliance shop which parking lot provided some shelter from traffic as I changed tubes.