That awkward moment when your brain is pretty tired but you're staying up late anyway and everything seems funny, but you realize that because of this you probably should stop posting on the forums. But then you don't.
At least that happens to me when I get tired. My head feels funny and I feel real silly. And then later I'll look back at my posts (or my emails, or my messages on Facebook, etc) and think, "Oh man..." Just as I probably will with this post tomorrow!