I prepped some plates for a demo on indirect drawing,or the "Paul Klee technique" as my boss calls it, but I over inked them, so they never dried to the right consistency. I put them outside for a couple of hours, hoping that the sun would speed up the drying a little but instead the wind deposited a large amount of debris on the surface of the ink. Rather than waste them, I quickly cut out a silhouette, placed it at the bottom of the plate, and ran a print from it.
I like it so much, that I salvaged one of the sheets that someone else threw away from the garbage, soaked it, and ran the ghost on it. The sheet had been crumpled and had a layer of wheatpaste one it already from the previous failed print, imparting an interesting texture to the final image.