Courfeyrac flailed his limbs to try and sit up, finally succeeding only to have a snowball break over his head. Shaking it off, he lowered an eyebrow at Luna with a smirk, shifting into his human form. "Ohhh, it's on, now!" He quickly scooped up a handful of snow and straightened up. As he went to throw it, his low-traction human feet slipped out from under him on the ice, sending him flopping backwards and the snowball vertical in the air, then back down onto his chest. Sitting up, he rubbed his head and smirked when Luna 'tagged' him. Before he had to do much chasing, the ice did his job for him. Getting back to his wobbling feet, he burst into hysteric laughter at the fallen 'human,' sliding a bit, himself, and ending up on his butt atop the ice once again.