During choir practice, Bukut often spreads his thumb and forefinger to create a Y, which he holds under his chin to remind the bashful Bunun children to keep smiling. “ Open the mouth and bring strength to the abdomen. ” He also playfully scrunches his eyes to get the children to laugh.
練唱時，馬彼得常會把拇指、食指打開，以 Y 字型手勢放在嘴巴下，提醒個性羞澀的布農孩子要面帶微笑，「嘴巴要打開，腹部加上力量。」他也會擠眉弄眼逗孩子笑。