This could have gone very badly, luckily nobody was hurt and nothing was damaged.
- Fumbling the horn didn't help. I cancelled the shit out of that turn signal, though...
- The police vehicle was being erratic long before the incident. I could have hung much further back.
- It didn't occur to me to jump off the bike; maybe I should have. It could have been a very serious accident if he'd continued reversing. Not impossible I would have gone under the rear axle, or been pinned under the bike.
In fact I was confused, as I thought for moment I was going to get pulled over, especially at the top of the street when the vehicle stopped for no obvious reason a few feet in front of me. I fully expected the blue lights to come on.