Duke Nukem 3D. 'Nuff said. Do your job well, and you can sleep with sexy movie stars who depend on you. Unless of course the host that's close is busy, hung, or dead. It's been around, though. Yeah, I know this could be offensive.
Engineers think that equations approximate the real world.
Scientists think that the real world approximates equations. First they see two people going into the house. After a while they notice three persons coming out of the house. The car directly in front of you has a flashing right tail light but a steady left tail light. Tail lights are used in some foreign countries to signal turns.