"Don't bother, Sirius. Your line isn't even drawn straight." She rolled her eyes and took the pencil from his hand. He took his wand out and tapped the paper, making it straight. "That's cheating." He pouted and slumped in his chair.
"Drawing is terrible. Muggles are crazy." She raised an eyebrow and laughed.
"Go ahead; blame mankind for your inability to draw a straight line."