We were getting a new hangar, and chain-link fence surrounded the new concrete pad. This fence was well marked, too.
A supervisor in the maintenance department (who shall not be named here) was checking out a customer's complaint about the
brakes on his Cessna 206. He ran the engine up near the terminal building, and the brakes... didn't hold. I don't know what happened in
the cockpit, but the plane ended up tangled in a mess of fence.
Seven nose ribs, both leading edges needed skin, both wing tips wrecked, nose and one main gear wheelpant cracked up, prop mangled, engine had to come out for strike inspection... we ended up buying the airplane.
Solved the brake problem though.