"Neat," I thought. "That could be an interesting photo." I thought for a moment about stopping to pick it up and take home, but there were other people around and I thought that would dumb - picking stuff up off the ground - so I continued on.
I made it a few steps and realized that was just silly, so I went back and picked up the leaf and took it home.
I still have it, so maybe there will be more photos in the future.