Make sure you've swallowed all drinks and are seated securely before reading this.
I'm still laughing. That post was made of awesome.
Once you've read it, you'll understand why it put me in mind of this. I once spent a very instructive afternoon during a slow time at our bookstore reading it. Funny as it was, though, I don't think it made me laugh as hard as Dr. Isis just did.
(Tip o' the shot glass to Ed Brayton and his merry band of commenters)