Out of the many excellent strips to choose from, I see this same one made you post, too (yes, I'm way behind in my friends list reading, and just saw this, even though you posted it a couple of days before me).
This one is posted on my wall at work. I don't expect most of my co-workers to realize they are the ones portrayed in the first panel.
So I'm not the only one with xkcd strips posted at work. This one (http://xkcd.com/242/) is posted on my office door. Oh, and yeah, I'm a scientist. And yes, I did react that way to an electric shock. I did have enough of a self-preservation instinct not to act on that impulse, though. ;-)
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This one is posted on my wall at work. I don't expect most of my co-workers to realize they are the ones portrayed in the first panel.
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