Bill Gates' Doom Video
This video of Bill Gates within Doom was shown in 1995 at the Microsoft Judgement Day event to demonstrate the power of Windows 95 and DirectX. It's pretty funny to hear Bill Gates talking about the "power" of Windows 95, and the "realism" that games are capable of these days. Although, you might find it funnier that he's wearing a trench coat and holding a shotgun attempting to be a badass.
Link (via Slashdot)