Originally Posted by Vancouver

THE 'I'M-NOT-YAWNING' FACE.

You're in an important meeting. You feel a yawn coming on. But you can't yawn. That would mean disgrace. So you strike on an ingenious idea: yawning while keeping your mouth closed.

Because then no one could possibly suspect that you're yawning. Never mind the fact that your entire face is stretching out like cling-film over a toilet basin, or that your eyelids are voilently flickering, or that your nostrils are flaring. You can't be yawning.

After all, your mouth is closed, so...