I see them everywhere. They're languishing on doorsteps, hanging out in the middle of the road, dangling off street signs, peeking out of piles of garbage, reclining in the middle of the sidewalk, riding the bus for free. A great number of them are bright yellow as if they're fresh and have just been dropped, although they appear in all states of decay. I don't know how or why they caught my attention, but within a week of being in London I couldn't get my mind off these banana skins. Where were they coming from?