“To allay their concerns, a 200 pound construction engineer in a hardhat made a call. He removed his hat, took a running start at the window, hitting it squarely with his shoulder. He replaced his hat and departed. The complaints about the window stopped.”
There was a story about a while baack about someone who tried a similar demonstration with window bars, and fell to his death.
That's the kind of test I like, it shows (misplaced) faith in one's work. Better the builder than his clients. It's not likely he'll ever build a substandard restraint again.