The aftermath of the unrolled rolls of steel sheet I've seen blocked the freeeway and took quite a while to cut up into pieces to remove from the scene. Plus a buncha concrete pavement sections got smashed from the initial bouncing and had to be replaced in short order.
Good to periodically check your loads and have redundant chaining.
I seen one fall off a truck and when it hit it telescoped out about a 100 ft... taking out a few cars with it! No one got hurt but was a thrill to see!