Al's laugh echoed his brother's, open and loud and quite a lot similar to Jamie's. "Someone's brother was showing off and didn't even notice that I borrowed his instructor."
He paused at Jamie's next words; his laughter stopped abruptly. "No I didn't," he said quite seriously, looking up at his brother. "But I do now. I will." He nodded... frowned for a second, sorting out his thoughts, then reached out and rested his hand on Jamie's shoulder.
"When you pat my shoulder, it's three taps," he proceeded to move his hand in demonstration. "Not one."