This experiment, conducted by the American Society of rental trucks, trailers and containers U-Haul, shows us the importance of having a good load distribution on a trailer. A mini Ford Mustang GT driving with a trailer on a treadmill. When the weight is properly distributed, in this case with a slightly higher load on the tongue of the trailer, the vehicle and its load quickly stabilize when the trailer begins to oscillate. Conversely, if the weight is greater at the rear of the trailer, the oscillation thereof is amplified and becomes uncontrollable. The accident is then inevitable.