"Ha ha. I like this," said Stanley, or rather Jeff, as the man punched in some keys on the keyboard.
Chihuahua Jeff struggled in the grip of Stanley, the neighbor's cat that had managed to swipe his body.
"Here we go!" The new Jeff punched in the final command.
The old Jeff felt his canine body grow slightly, and re-arrange. Still held by the scruff of his neck, he was turned to face a mirror.
"No!" He thought. "I'm Stanley! He's changed me into a cat."
"Still one Jeff and one Stanley," the impostor Jeff said. "With nobody the wiser. Hope you like cat food."
He meowed. "Jeff" carried him over to the window. He released the large cat, which dropped to the ground below. The cat landed on all four feet.
"Now beat it, Stanley," the new Jeff said. "I've got some fun plans for my new body."