When I finally paid attention to what Ellie was screaming, I had to see what she had done. "Mommy! Judd's a witch! A witch!" Judd didn't seem to mind being a witch.
Later, I just happened to stumble upon this.
Other things I have encountered lately: Ellie rolling Judd around on the floor, Ellie putting stuff in Judd's mouth, Ellie dragging Judd across the floor, and Ellie pretending to be Superman flying through the air while balanced on Judd's tummy. Judd doesn't seem to mind.