Extreme trailer sway leads to crash - GIF

[mansworld]

The most common cause of sway are gusts of wind, or in this case, drafts from passing vehicles.

[NortonDommi]

The most common cause of sway are gusts of wind, or in this case, drafts from passing vehicles.

Also incorrect loading No.1, stupid driving No.2. I don't know why but many people commit crazy passing maneuvers and speed when towing a trailer. The same idiot mentality that makes people tailgate when it rains.