Teething — it’s happened to all of us and none of us remember it, but everyone knows it makes babies cry.

While the actual process is much longer and arguably more painful, it only takes an unusual time-lapse video 20 seconds to show just why that’s the case.

(H/t Mental Floss)

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Carleigh Knight (left) and her sister, Natalie Rogovin, look at Christmas ornaments while shopping at Kudzu Antiques + Modern in Decatur on Tuesday, Nov. 25, 2025. (Natrice Miller/AJC)

Credit: Natrice Miller