Courierdriver,
you need to understand that energy flows from areas of high potential to low.
A bowling ball on the top of a flight of stairs can be pushed into a cradle, that through a series of levers runs a dynamo that powers a light.
When the bowling ball is at ground level, it can't be harnessed anymore to provide energy.
Something needs to get it back to the top of the stairs.
And that takes energy, and more energy than it can deliver down the downslope.
When Kschachn stated that water was a bad starting point, it's because water is at the thermodynamic bottom of the stairs...burn gasoline...you make water, burn wood, you make water, eat a french fry and exhale, you make water.
For that matter, CO2 is pretty well at the bottom of the stairs as well.
The link that you provided shows a system where the bowling ball is at the top of the stairs (hydrogen), falls to the bottom (by being burned with air in the engine), produces power.
That's possible, and sensible.
But to get to the top of the stairs again, it needs to be lifted there again, and by something.
The engine can't produce enough power to run a generator to make the hydrogen, to run the engine.
Think about the magic aspect.
If the whole show was 100% efficient, it would be a perpetual motion machine. There are laws and theorems that describe that as impossible, but ignore them for a second...make the machine 100% efficient, and 100% reversible.
As soon as you hooked an LED to the process, it would cascade to a dead state...just the noise that it produced, and the heat to the cooling system would be sucking the energy out of it's perfect balance, and it would grind to a halt.
The "car runs on water" crowd somehow convince people that the bowling ball magically reappears at the top of the stairs, every time, to repeat the trick.
In my view, there's enough in the battery that you can do a youtube vid on the capacity already in the battery, and make it look pretty realistic....like I said, the world's least efficient electric vehicle.
But I do keep abreast of the claims.
* Joe Cell at least claims to be tapping zero point.
* Meyers and others use(d) a strange electrical pulse modulation that miraculously gets the bowling ball to the top of the stairs.
Like you say, someone may crack something.
An entirely new set of "natural laws" will have to follow on from it.
World's least efficient electric vehicle isn't it 'though.