Ever used one of these?
Wear shin guards.
This isn't my pic, still trying to find one of it. It's a Mobilco Barrow Saw. Powered by a Villiers 5hp engine. Dad brought one in the early 60s, used it once or twice and then put it in the back of the Barn.
It stayed there until about 2002 when I gave it away to a local to restore. Motor still had spark when it was turned over.
Brutal things, glad I never used it. Mite have been the initial trigger to my career in WHS. The blade cut direction threw things at you at ground level. Bounce bounce whack!