I do know that if a person takes a bottle of water, takes a drink from it and in the process squeezes the bottle a bit and then replaces the cap without releasing the squeezed grip from the bottle, then when he takes the cap off the next time, the bottle will many times crinkle as it expands out after cap is removed.
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"Whenever I feel the urge to exercise I lie down until the feeling passes away."
Brick