the.com/rock bottom

The one floor that doesn't creak — nowhere left to fall, only up.

means The lowest possible point of a situation, especially a personal crisis, after which things can only improve.

from A literal 19th-century mining and sounding term before it became emotional — 'rock bottom' named the solid bedrock beneath looser soil or water, the true floor you hit when there was nothing softer left to dig or sink through. By the late 1800s the phrase had surfaced into ordinary speech for markets, prices, and finally human lows: the point as factual and unyielding as actual stone.

origin
mining term for the solid base layer
recovery lore
AA calls it the moment denial quits working
paradox
the worst place that often starts the best story
myth
it has no fixed depth, everyone's floor differs
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