Wow!! That's a good read, but sorry guys, that's a hard story to believe!! As they say, gonna need pics.
How close to the front of the rig were you when you doubled your strap, maybe 15 feet max? That's too close for comfort. The driver would barely be able to see the end of your Liberty over his hood. How did you finally get traction if you were sliding all over in an arch and if he was stuck in deeper snow? Why did you have to pull him all the way across the rest area to the exit after getting him unstuck from the deeper snow at the entrance, especially if it was flat to downhilla little? That's the first time I ever heard a driver refer to how heavy he or his load was in percent. Truck and load weights are refered to in actual weight. Load weights vary, some very light, others maxing out the legal weight limits for the truck. Saying he was 10% loaded means nothing to anyone. It's also hard to believe the driver didn't have a cell phone. If he didn't, there should of been some at the rest area he was in. He really must of been desperate. Drivers tend to shy away from strangers at rest areas too.
BTW... I drove tractor trailers for 19 years after I retired from the Air Force is why I find the story hard to believe. Too much stuff doesn't add up from a trucker's point of view. A tractor, with an empty box, weighs in at least38~42,000 lbs give or take a few. That's a lot of weight to be pulling, especially out of the snow, even for a large rig set up to handle 18 wheelers.
Anyway, glad you weren't hurt on the trip home after being stuck by a sheet of drywall flying off a truck. I hit parts of a soft plastic pallet that a pickup truck ran over on the freeway in the lane next to me and spread flying debris everywhere. It took off my entire left fender flare, the parking light was gone, and a small section of the bumper was gone. You got super lucky and it only broke a fog light.
