Yesterday a student came to me at the end of a lecture to point out that in one slide, instead of "la courbure de l'espace-temps" (the curvature of space-time) I had put "la courbature de l'espace-temps" (the muscle ache of space-time).

Realizing my error, I naturally doubled down and affirmed that space-time is God's muscles and lifting heavy objects like planets and stars gives God cramps, whereas if God played dice with the universe he'd be more likely to have repetitive stress injury. QED.

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