Actually they were morons, and just waiting for an accident to happen. This accident wasn't the result of improper loading, high center of gravity, or anything else mechanical. This was stupidity at it's best. You have a couple of guys that are very obviously mechanically inclined, they have to be, there jeeps were highly modified and looked very nice. The pull vehicle was newer, and in good shape, though alittle under powered and overloaded. The trailer was a tri-axle and also a deck over, which was about the only kind they could use given the very wide track of the modified Jeeps. What done this guy's in was not having a good understanding of what is needed to tow safely. The trailer was equipped with electric brakes , but they never hooked them up. This was the first strike against them. They were also pulling a heavy trailer (for a open trailer) of about 2500lbs, 2 jeeps at about 4500lbs each, so they had approximately 11,500lbs, being towed by a SRW truck, strike two. The guys were most likely traveling at too high of a rate of speed, on a secondary road that is wet. The worst , absolutely worst thing anyone can do when your trailer starts to wiggle (wagging it's tail) IS APPLY THE TOWING VEHICLES BRAKES. Please if you do not remember a danm thing about this accident, don't forget this. When descending a hill (and it does not have to be a huge one) the trailer is trying to push the towing vehicle, In this case a 11,500lb trailer was pushing a 5000lb truck. You can insert your truck/trailer into this same scenario. The trailer is wagging, and the further down the hill he goes the more it wages, as soon as the truck starts to apply the service brakes, the trailer quickly over comes the grip of the tires, the trailer now pushes the truck sideways and the rig jackknifes. This driver could have gotten out of this mess, with just alittle common sense, first thing he should have done was to slow down, especially before cresting the hill. If there would have been trailer brakes, you could reach down and apply ONLY the trailer brakes, by using the manual lever. This manual application of the trailer brakes, slows the trailer, which most of the time will straighten out the trailer. Under some extreme cases, you might have to apply the trailer brakes, and at the same time apply throttle to the tow vehicle. This guy could have applied throttle, but buy being a secondary road, wet, overloaded it wold not have helped, most likely. This accident most likely started from the trailer axle catching or going off the edge of the road, and then spiraled out of control from the correction, and use of service brakes. If you catch the edge, don't over react, apply power and slowly re-enter your lane, try and avoid any sudden movements. Also when you mount your electric brake controller, mount it were it is accessible, easy to reach and operate. This should not be a beauty issue, it will do you know good, if you can not get to it, quickly.