"No need to be angry?" He raised an eyebrow, deceptively calm. "Right. Because I shouldn't have started trouble if I didn't mean to finish it. Right."
He saw his grandfather move into a position to get his wand, and laughed, but it wasn't a happy laugh, or even a pretty one. He shook his head, pinching the bridge of his nose for a moment, wavering between more laughter and tears.
When he looked up at him again, there was just sadness in his eyes. Sadness, and perhaps a bit of madness, but not the dangerous sort. For now. He stood, pulling off his shirt and turning in a circle.
"Look, no wand. Not going to attack you. On my way to Azkaban, remember?"