Swivel wheel or the like

I don't know which bridge... He said it was on a curve. Tha tote was installed and the back end of the 5er was beefed up and blessed by the mfgr. He was helpless once it started whipping and he got bruises on his arms trying to control it. He said the 5er went up on both sides with the wheels higher than his head. The PU box kept it from going over but both sides of the box got caved in. The ironic thing is... He used to double tow his Ranger on a second trailer and he thought that wouldn't be as safe as the tote. I think that was way too much weight and length to be hanger on the back of any 5er. I looked scary to me as soon as he brought it home, before he loaded it for hunting. This was a large tote and there was as much length behind the RV axles as there was ahead of them. Craig