Doppler cheering--what a great term for the effect.

The different ways people honked their horns was also fun to observe. Chirpy staccato, sustained blaring, shave-and-a-haircut . . .

And the photos are beautiful.

People have been posting their photosets at the Facebook page. I turn up in one of them!

I hadn't even known of the existence of the Sisters of Perpetual Indulgence, so thank you for that link, too.

You're welcome! I have no idea where or how I first heard of them, but they make me very happy. Derek Jarman is one of their saints.