This business is at least a source of entertainment that can be
achieved with a couple of carbon rods, grommets, a soda bottle,
and a welder with good current control,
http://jlnlabs.imars.com/bingofuel/html/aqfdem.htm
but don't blame me if you try this at home and run into
trouble with respect to some of the obvious safety hazards.
Assuming that it really is just pure distilled water in the bottle,
the question of just what the flammable gas coming out of
the process is, and how it got made, is a worthy one before
you even get to the question of energy in versus energy out.
When asking and answering these questions, however, it is best
to stick to the scientific method and an exaustive analysis using
science as we know it before jumping to any conclusions of there
being new unknown science in play.
Have fun,
Eugene