Haha. What was heartening was the immediate attention I got from fellow cyclists. I must admit I haven't watched the video from after the moment of impact, but I know I was rather disorientated, and that at least two people got me safely onto the pavement, and did all the right things.
BTW, the bike needed some attention, so having come to my senses, I took it to Exeter Cycles just along the road, and they had it sorted by lunchtime, with a new chain, cassette and front wheel.
I didn't tell the doctor that I was cycling home... though in my defence, I did go very very carefully, on the 'bike path'.