When I saw this leaf on the window, the sun was peaking through the clouds and it shined orange. The sun quickly disappeared and when I looked at the result - OOPS - camera was on manual focus - not the image I expected.
You might get unexpected results buying a cake here.
The first time we saw this scene, we got unexpected results. We were eating a restaurant across the street one night. Marianne had a good view of the face, but the wings were hidden in the shadows. She finally said "why is that man not moving?". Finally we decided it was a painting. And indeed it is one of several "trompe l'oeil" paintings by William Cochran in Frederick. Another one is below.