"That sounds perfectly, obnoxious reasonable," Sirius replies with a hint of a grin to show he's teasing. Reaching back behind himself, he finds Kieren's hand with his free one and squeezes tight as he holds his wand in his other hand.

He considers his proximity and the force of his magic for a moment before carefully taking a few steps back, dragging Kieren along with him. Then he pulls in a breath and says, "Reducto!" as he swishes and points, sending a zap from the tip of his wand straight into the stone, blasting it dozens of pieces with a great crack.