I took this photo on the train going to work. The earring of the woman in front of me glittered and sparkled in the brilliant sunshine that streamed through the window to my right. I stealthily dug out my camera, adjusted the settings for the bright light, focused on the earring — and pressed the shutter button just as the train plunged into a tunnel. Oops! Despite being so underexposed, there’s something about this photo that I quite like. In a way, it reminds me of pop art from the 1960s.