Ever heard of a "Rube Goldberg Machine"?
If you havent, they are wile e coyote-esque, overcomplicated machines that do very simple things. Another good example is the game Mousetrap.
Som creative individual used Gary's mod for Half-life 2 to make one, and it is a great vehicle to showcase the Source engine's physics abilities.
http://video.google.com/videoplay?do...f-life+2&hl=en
It is just amazing.... And the tech that is supposed to come out in the next year is going to set the bar even higher. Best of all (for me anyway), game companies have been hiring actual writers since HL was a big success (Mark laidlaw is still on staff scripting the games)
heres another:
http://video.google.com/videoplay?do...f-life+2&hl=en