The craziest thing is that he had PLENTY of time to take action to stop the sway. He should have immediately applied the manual trailer brakes. If that didn't stop it IMMEDIATELY, he should have continued to apply the trailer brakes and accelerated slightly (like pulling a bent string from both ends, it straightens out), then slow down and pull off the road safely. If none of that worked, then he would have had time to take measures to find something to grab 'hold of because he was going for a ride!
But he had PLENTY of time to do a lot of things that could have prevented this.
I actually made my wife watch that clip several times as a learning exercise.
Here's a thought though; what if he didn't have a brake controller in the truck?
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!