Sirius quickly cast a shield charm around himself and stood up, looking around the room. He smirked and stared at the spot where Remus had been, listening since he couldn't see him. The floors were old and creaky, and the place was dusty. When Remus eventually walked, it would tell the tale.
"Sneaky," he whispered, shaking his head. "You have to do better than that, Moony." Flicking his wand at the sofa it rose several feet in to the air, still flaming, and with a sharp jab he sent it flying across the room towards were Remus had been standing. "Come out and play fair, Moony!"