The dog

On the way out to the Pinnacles, I reached back and lowered the electric window in the back seat so the dog could stick her head out it and take in all the exciting new smells. I did this three or four times during the trip.

On the way back, we wound all the windows up and had the air conditioning going (to stop the kamikaze bees). I turned around at one point and was surprised to see the back window open. I didn't open it. I asked Rose. She hadn't opened it. We concluded it had to be a fluke. Surely the dog had trodden on the button by accident.

To test this hypothesis, we wound the window back up. A little later, I turned around again. Sure enough, the window was down. I find it very difficult to credit, but it looks awfully like it was deliberate. It was done twice, and it was the same window that I'd demonstrated how to open both times.