Jill and Jack / began to frack. / The oil boosts their town. / But fractures make / the bedrock shake / and Jack came tumbling down.

"Jack and Jill", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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Jill and Jack / began to frack. / The oil boosts their town. / But fractures make / the bedrock shake / and Jack came tumbling down.