Those who believe in conspiracies have a very strong point here. Inventor Paul Pantone was jailed after making a video. Paul developed small engine that runs at 80% water plus various other things (and yes, it works).

Some major oil companies offered Paul a lot of money for his patent. Paul had one goal only that the invention is used to help the mankind.

Whenever possible he refused to sell his invention supposedly Paul was taken to court and argued that he is crazy because he turn down an offer for a large sum of money.
Paul thought principles over profit. Paul was finally placed in a mental hospital and was pressured and tortured to try to get him to sign over his patent.
Paul Pantone knew he would never be able to market his invention, and he put some do it yourself plans to modify its engines.