He should have burped," Charlie said.
“Of course he should have burped,” said Mr. Wonka. “I stood there shouting, ‘Burp, you silly ass, burp, or you’ll never come down again!’ But he didn’t or couldn’t or wouldn’t, I don’t know which. Maybe he was too polite. He must be on the moon by now.
- From Charlie and the Chocolate Factory by Roald Dahl.