This Olympic Google Doodle lets you run and jump the hurdles without hitting the track or breaking a sweat. Just use your arrow keys to run and the space bar to jump the hurdles. Just like a real hurdler, you have to get your steps and timing right or you will be slowed down by the hurdles.
http://www.google.com/doodles/hurdles-2012
The previous Google doodle celebrated the classic Olympic event of the javelin.