I did not know that hot water under pressure (steam) could drive something so quickly.
WORLD RECORD Water Rocket Car 0 - 343.5 kph in 2.5 sec
http://www.youtube.com/watch?v=CDDI5h8JQE0
F-word in background - warning (goofy demo of kart)
50,000 Watt Electric Go Kart
http://www.youtube.com/watch?v=-xitMWUfeLk