"Are you a carpenter? Such simple lyrics actually make me think of sawing wood..."
"You were singing just now? If I hadn't opened my eyes, I'd have thought a duck had waddled in!"
"Even a pig's oink sounds better than your singing!"
...
His master stood at the shop's entrance first thing in the morning, mocking people. After humiliating someone, he'd shoot Dumbelldore a look. Dumbelldore finally understood why he was told to bravely step forward and intervene when encountering injustice.
This guy is doing it on purpose!
What, the Black Clan's Five Bears triggered Lin Bai's pleasure in mocking others? Bullshit! Lin Bai had this planned even before the Black Clan's Five Bears showed up. He's simply enjoying the process, and perhaps even using the opportunity to test himself... Who knows which dumbass came up with such a ruthless, utterly brain-damaged AI!