I have tried messing around with the HHO a little bit and it is pretty fun to tinker with. A little on the dangerous side. We were like ohh cool we have a flame. Then Boom... yeah I new better than to not have a flash arrester on it. Hydrogen and oxygen sure does burn fast.
.... luckily the guy helping me was a deputy sheriff cause right before it blew he said you know if I saw this without knowing what it is I would think someone was makin meth. I don't mess with it anymore. Glad it was small scale. 