Funny, though, that HHO still doesn't fully describe what's going on there.
In reality, because the stable environmental forms of H and O are actually H2 and O2 (as OTM pointed out), HHO cannot exist in a stable form. What's really happening is the separation of H, H, and O from a single H2O molecule to form H2 and O, which then is unstable and bonds to another O molecule to form O2.
What you end up with is H2, H2 and O2, which comes from 2 molecules of H2O. If allowed to recombine in this form, you'd have Hydrogen Peroxide and an extra H2 molecule.
Maybe instead of perpetual motion it's "Peroxide motion"?
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