It's happened in a million different Saturday morning cartoons, someone grabs a firehose oblivious to its power and gets taken for a wild ride. Well someone got the rather obvious idea of harnessing that power, and turning it into a whole lot of awesome. 

Sure a jet pack where you're constrained by the length of a hose kind of defeats the purpose, but it's pretty damn cool to watch nonetheless. Hopefully firefighers will pick up on this, since they would be able to put out fires AND not have to climb ladders.