"That is where you're mistaken, my friend," Sirius said, pulling his wand from his pocket. "I am always up for some Slytherin baiting."

"Oh I know that look," Cat murmured. "That's not a good look." She held her own wand warily, just waiting for the impending jinx she knew was coming.

Sirius smirked and raised his wand, mouth open to indeed cast a jinx. Cat had her wand up, quick as a whip, and wordlessly cast a disarming charm. Sirius' smug look disappeared as his wand jumped out of his hand and landed on the ground some twelve feet away. This time, Cat was the one who smirked.