Got the inspiration (and invaluable location directions) from fellow PBase member Cedric Sims.
See http://www.pbase.com/cdsims/image/39172940 for his wonderful photo. I think I like his better.
I checked Cedric's picture and I must say, I like yours better ;-)
Maybe you can give me some hints about time and location as I plan to go to SF in a couple of weeks ?