Spotted this while I was cleaning my bike today. I honestly don't know whether to be disappointed that this chain broke, or impressed that it didn't fail completely. Either way, I'm glad it held long enough to get me back to the office.
Anyway, I decided to give my trail kit a shakeout and did the repair like I would on the trail: portable chain tool & missing link. Got it done in under 6 minutes, finished cleaning the bike, and it's ready to roll tomorrow.