I would never have guessed that a video like this would be so disconcerting, but there's just something horribly wrong, on a molecular level, with the sound of laughter emanating from an unmoving, serious face. Look, don't take my word for it — see for yourself:

What did I tell you? You didn't believe me, did you? You probably thought that I was simply utilizing the literary technique of hyperbole. But now that you've seen these sixteen people laughing maniacally through stone-solid countenances, you probably feel like somebody reached into your chest and hooked their finger into the pliable ectoplasm of your soul, don't you? Aagh!

Sources: CH Spercuts | h/t Digg