lol, i know the very same feeling.

that-unexpected-got-you-by-suprise-imma-regret-not-saying- _____ -later feeling

BUT

its better than the responding with the wrong reponse and having the

what-the-ufck-was-i-thinking,-why-did-i-say-that,-that-was-lame,-i-feel-like-a-douche,-and-everyone-is-prolly-laughing-at-me-feeling.