I see your point PJ and from the markings on the container it might well be there's another one behind it too. But, loading it like this also means it would almost certainly have to be picked off the trailer with a crane too, which dudn make a whole lot of sense since you couldn't drop the trailer at a dock with it loaded this way either.

No matter what, it sure seems that the load wasn't properly blocked in when it was loaded. This means the driver likely had no way of knowing he was takin his life in his hands by even carring such a load this way ...... which pretty much figures