To make a long story short, in 1978 a logger named Henry Sindt managed to rip the whole truss assembly off a bridge over the St. Joe River in Idaho after he lengthened the boom on his yarder. He put the machine on his low-boy, headed upriver doing 70 mph, got to the bridge, drove across without letting the air out of his tires...fortunately, he managed to get all the way across before the bridge fell in the river.