The kitty has discovered and become displeased with the roof window panel in the attic. He tried to hop up onto its "window ledge" to no avail. I put a stool under it, and placed him on top of the stool, and he stood on hind legs with front paws on the window. This was not like anything he'd seen in the line of windows before. He batted at it slightly, in consternation. He said, "Meep!" and hopped down.
Now he washes his paws as if none of this had ever happened.