Li-Ku, a high ranking officer in the Tang dynasty asked a famous Chan master:

"A long time ago a man kept a goose in a bottle. It grew larger and larger until it could not get out of the bottle any more. He did not want to break the bottle, nor did he wish to harm the goose.

How would you get it out?"

The master was silent for a few moments, then shouted, "Oh officer!"

"Yes."
"It's out."

Huston Smith, The World's Religions. 1958.