Hogfather - Banjo

'How come your brother likes him so much?' Medium Dave grimaced. Banjo had always done what he was told, simply because Medium Dave had told him. Up to now, anyway.

It must have been that punch in the bar. Medium Dave didn't like to think about it. He'd always promised their mother that he'd look after Banjo, and Banjo had gone back like a falling tree.

And when Medium Dave had risen from his seat to punch Teatime's unbalanced lights out he'd suddenly found the Assassin already behind him, holding a knife. In front of everyone. It was humiliating, that's what it was. And then Banjo had sat up, looking puzzled, and spat out a tooth

***

Hogfather - p265