It's the kind of experiment where you hope that nobody you know comes around the corner and starts asking questions!
I was trying to find my way down to the river and chanced upon some sheds used to house rowing boats and oars. Glancing into the window I saw this dazzling white frame. I took a quick shot but didn't really understand what I was photographing. It's actually the window on the other, sunnier, side of the shed. If you look carefully you can see there's a roller-blind on that window and the sun is streaming in all around it, making the white frame. Everything in the shed is so dark that it's producing a wonderful reflection of the trees and bushes behind me. The reason I didn't explore further was that I was pretty certain that I was on private property. I could get to the river OK but there was no riverside path anyway. All I achieved was the enigmatic shot on the right.