Ha ha, when I was a kid my mate Hughie Bowden (RIP) and his brother Ralph were always "Test Pilots" for their Dad's inventions. He built them a Mini Bike with a big Canadian Chainsaw engine with a dog clutch.
Only problem with the Canadian chainsaw engines was they drove out the opposite side of the engine (right side) than the old Victa engine that was in it, and Mr Bowden didn't realise when he installed it.
They fired it up inside the old cement sheet clad garage, and the noise was deafening. Ralphy gave it the berries and dumped the clutch, and to our surprise, he shot backwards, straight thru the cement sheet wall!
It was just like Herman Munster, (Ralphy even looked a bit like Herman) the hole in the wall was pretty much the shape of Ralphy's upper torso, and when we ascertained that Ralph was still alive, we pissed ourselves laughing as poor old Mr Bowden shook his head in dismay.
It was a big engine (I think it was around 200cc's, but I don't remember for sure) and also saw service in a Go Kart, and then the famous "Nedwob" ride on mower that Mr Bowden made out of an old cast iron bed frame. Great memories........
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