The perpetual motion one makes sense I think since I’d something can run forever could you even stop it? Or maybe it holds a certain torque until acted upon by a greater force

“The lumber mill had to be shut down because someone overloaded the perpetual motion machine providing power to it and now the bosses are trying to figure out if they can get it fixed or if it’s cheaper to buy a new one, they just don’t make things like they used to”