Ghost Droplets

I was taking Iago out to do his business in our backyard when I noticed something.  It had rained that morning (Saturday) and there were droplets of water on the long leaves of a potted plant on our patio.  That's what I thought until I took a closer look ...

Ghost droplets.

... and I realized that the leaves were in fact dry.  Somehow the image of the raindrops was printed on the leaves like a photographic exposure.  I've never seen this before and I have to say ... It's pretty cool!