Update: It was a decent ride, until I got a massive puncture in a messy "bike lane ghetto" (bike lane that never gets swept, separated from roadway with concrete curbs). I booted the hole as best I could and started riding home, cautiously.

Until my front wheel hit something sharp (in a bike lane, of course). Pinch flat, and no more spare tubes. I tried to patch it, pumped it up and hurried home, but the patch gave way.

I made the phone call of shame.

I am discovering a new hatred of bike lanes. Filthy things.