How to sleep while sitting upright

Now to be clear, I don't condone sleeping at work, but sometimes the need arises and it is SO necessary. As a result, I am a self proclaimed specialist in sitting perfectly upright while sleeping. Here is how it's done:

1. position chair so your body points directly at your computer, then scootch your chair all the way in so that the desk supports the lower part of your upper body.
2. pull bangs down artistically in front of face. This has the added bonus of making you look good, when really you are using them to camouflage the closed eye closest to the hallway.
3. pull up something on your computer that looks like you're working, but doesn't need you to physically interact with it. In my case, this is always a scholarly article.
4. place right hand on mouse, left arm wedged between your body and the desk, and proceed to sleep.

This has worked so well at work that often times I have colleagues come up to me and start talking to me while I am sit-sleeping, to which I immediately turn my swivel chair and begin talking to them in a manner which seems to say, "why, I've just been sitting here awake this whole time, what can I help you with?"

Beware though! A brief tale of caution: Often sit-sleeps are great for a quick snooze/reboot, but don't let it get out of hand! Sit-sleeps are only thwarted by the hibernate function on your computer, which leaves you sitting very still in front of a computer that is off, which is quite the embarrassing situation to be caught in by your cube-mates. Believe me, I know from experience...