Trailer sway crash - GIF

[Frank S]

Last year we rented a 5000lb roller and the trailer to haul it. When the guy loaded it on the trailer for us he drove it right up to a predetermined mark on the trailer. My friend complained all the way back to my shop about the tongue weight on his brand new F250. So when he returned the unit he had me leave it back about a foot from where the guy had put it when we rented it. The machine was still centered ahead of the centerline of the axles but not by much. I told him to call me when he had problems and I'd try to explain how to drive it so he can reposition it on the trailer. He looked at me like I had grown a 3rd eye. About half an hour later he calls up and askes how do I start this thing? I can't get over 40 MPH. I about fell over laughing.