Dammit! The power is still on!
Yet another reason why you should check that there is no power coming to the box you are working on. This time it was just across my right thumb, so nothing major and I realized it immediately. Yes, I said this time – I’ve been zapped with 110 volts six or seven times in the past.
The lesson learned today:
Make sure you update the labels in your breaker box when you move circuits around.