I'm glad no one was hurt, and it sure would scare the heck out of you. When we bought our coach we got caught in a bad wind storm on the way home. I lost the cover off the front a/c and it almost hit my wife who was following behind in the car.
These things get pretty brittle after time and need to be replaced. I replaced both of mine plus the one on the fridge. I have seen where people are trying to fix these things but to me causing an accident with flying debris isn't worth saving a couple hundred bucks. I have made hooks to keep my slide toppers in place and a rig to keep my main awning from furling out. It probably does not exempt me from problems but at least it will cover the obvious things.
Dennis & Marcie & Hook The Jack Russell, 2001 HR Imperial 38wds 350 Cummins, 07 Chevy Trailblazer/Blue Ox/Ready Brake, 04 Dodge 3500 Cummins,