A math related Stock Phrase. The Smart Guy states the result of his calculations, only to be corrected. He promptly says: "Oh yeah, I forgot to carry the one". The phrase's purpose is to show that even though The Smart Guy is only a human, and therefore prone to mistakes, he is able to spot where he made the mistake and explain it in a short Techno Babble-ish sentence. Commonly used in this form: Has nothing to do with when your Chosen One refuses to walk. Compare with Misplaced a Decimal Point, the other common arithmetic mistake. Examples of Carry the One include: