This video just went viral on the internet a few hours ago and everyone is praising the driver for his "amazing driving skills" and "awesome save". Lol, it was a save, but the driving skills and awesomeness can be disputed!

I honestly don't know much about cars, I know about this because I've seen that physics demonstration with the model car I linked, so I know whenever you're hitching/towing something, the weight needs to be evenly distributed. The bulk needs to be as close to the back of your car/truck as possible.. If all the weight is at the end of the tow and there's a lot of weight, you lose control.

Edit: Also, this is a good reminder to keep an eye on others on the road, especially the highway. There are many who are ignorant to this. If you see a vehicle with a hitch/trailer, towing something extremely heavy towards the back, stay away from it. All it takes is a bump in the road or a small turn/curve to send the hitch swinging, wiping out any near-by cars. Either pull back or drive ahead of it when safe (like 2 cars did in this video, otherwise they would have been hit hard).