I used a Toyota LandCruiser FJ40, the old style, a 1973 model, to pull firewood out of the trees along the river with for a long time. I would haul my saw stuff in the cruiser and load the wood on a two axle 16 foot trailer with no trailer brakes. I was stupid overweight for the 4200 pound cruiser, but what the heck, it was rural, all county and nothing was going to happen.
Well, something did happen at about 40 mph. A gentleman pulled out in front of me and I stood on the brakes. Spun my FJ40 around like a puppy on a tug rope. Dumped firewood in the road and ditch, turned me completely around and I was sliding backwards. We did not collide, but it was definitely an eye opener for both of us.
I got off lucky, the FJ stayed on its wheels and the trailer tongue on the way around crushed the driver's side tail light. I wound up in the ditch at an odd angle, managed to drive out and it took about an hour to get my load back on.
Had he pulled out a couple of tenths of a second later, I could have easily killed both of us. I felt very lucky to escape. After that I put brakes on the trailer and pulled it with my 67 Chevy K30. It happens so fast and you have no control over enertia, you are in for the ride. Like I said, I would pull a M1008 with a M1009 on a tow bar, but not very fast. Glen