SALT WATER AS FUEL, Energy from tap water- whatever next? Why use dirty oil?

SALT WATER AS FUEL, Energy from tap water- whatever next? An Engine that runs off GRAVITY? Well – YES! Check it out.

Have you seen the sensational TV-news video running around YouTube? A test tube full of salt water is blasted with radio waves and ignites with an orange flame that powers a small sterling engine. Power from salt water, the most abundant substance on earth — Eureka! 
http://www.motortrend.com/features/editorial/112_0711_technologue/

http://video.google.co.uk/videoplay?docid=1894114348589876273&q=salt+water+as+fuel&total=114&start=0&num=10&so=0&type=search&plindex=1

http://video.google.co.uk/videoplay?docid=-6286475520406148302&q=energy+from+water&total=3148&start=20&num=10&so=0&type=search&plindex=0

http://video.google.co.uk/videoplay?docid=2205123808600875208&q=energy+from+water&total=3148&start=50&num=10&so=0&type=search&plindex=8

http://video.google.co.uk/videoplay?docid=6170810824086226301

http://video.google.co.uk/videoplay?docid=-402416601018668534

Engine that runs off Gravity?:

http://video.google.co.uk/videoplay?docid=8294928602279039059