I pulled up at an intersection in town this morning when the lights were red and pedestrians were crossing in all directions. I thought for a moment about going from cyclist to pedestrian mode, and rolling slowly around the corner with the pedestrian flow.
For some reason, I held back. And just at that moment, a motorbike pulled up behind me.
I was a bit surprised, as I was in a bus lane and motorbikes usually stay out of them. I puzzled over it for a few seconds, and then it dawned on me that it was a powerful but quiet bike.
Only one sort of person has that sort of bike.
I turned to my left and had a look at our reflection in a shop window - sure enough, it was a police motorbike. He was sitting there behind me, waiting for me to run the red and give me a ticket. I've seen it happen in town a few times now. I never looked back at him, trying to give him the idea that I was blissfully ignorant of his presence.
I must have a sixth sense for this sort of thing.