This is a promotional video that Ricky Gervais and Stephen Merchant (creators of the original British version of The Office) created for Microsoft. I think these two are brilliant, but you have to like British humor to get it. The first video is 20 mins, the second video is 17 minutes. And it's gold.
They actually showed these videos at a Microsoft employee meeting. If only my company could pull these guys to make corporate training videos.