Now I love messing about on fast things, and I love blowing things up. I even used to make my own gunpowder with ingredients lifted from the school chemistry lab. And I do sort of admire the spirit of this - but it is NOT at all cool on public roads. Exhaust gases that are hot and intense enough to burn through metal, no control over where these things are going, all mounted pretty close to a petrol tank... oh yeah, this is smart.