I saw a news report on one of the major channels last night, either NBC or ABC Sunday night news I believe on natural gas fracking - essentially using water to help force out the natural gas from its hiding spot.  In the report they showed a guy who lives by the shale and he literally put a lighter under his water faucet while running and was able to cause it to go up in flames.  Water!  I can't find the clip itself but apparently there is a movie out called Gasland which is where that clip was pulled from.  Quite amazing stuff.

Here is the trailer, the 'flammable water' is after the 2 minute mark.