So I am playing SP. on a proceeduraly generated map. (Though the problem has occured sporadically on the original map.) As often as not, when I hitch to the wagon I shoot up in the air with it like I was a model rocket... If I can open the command line and type 'fly' fast enough I can save my life, otherwise I fall to my death, and the wagon, if brakes are locked, just hangs in the air forever.., BTW, other than this it is an awsome idea.