& @Mikker. I've often wondered if Scott is one of us - amusing himself by pretending to be a fan. Maybe even Stormthehouse and/or histerik etc, just to see the response of his fans.
Clearly the floating squirrel is trying to attract attention. Though you or I might find floating critters unusual, the previous panels indicate that PHB does not. So unless the squirrel wants to be ignored entirely, it needs to wave its arms to even get PHB to look.