On hearing the instructions, Remus flashed a quick smile to Sirius. "THERE YOU GO, PADFOOT. SOMETHING FOR YOUR UNIQUE TALENTS." A little bit of teasing as to his friend's singing ability. "THOUGH A BARK MIGHT BE MORE USEFUL THAN THE SINGING."

The Muggles had seen enough at this point that the shapechange might not bother them. And, frankly, he found he'd be happy to see the Grim.