Electrolysis Detonator!

The H2O splitter

Hand cranked electric generators rip H2O molecules into tiny bubbles of hydrogen and oxygen in a 2:1 ratio streaming from opposing electrodes. These bubbles collect until a spark triggers the underwater burn of hydrogen + oxygen, releasing energy as the bubbles rejoin into molecules of H20. These water molecules have now come full circle on a wild ride of flowing energy! The electro-chemical process and the cooperative experience repeat poetically, while delivering two essential-science insights:

Muscle energy is the only source of the energy in the reaction. (the law of conservation of energy)

and

The chemical formula for the "smoke" is H2O !