“All’s well that ends well” isn’t one of the rules of gun safety, at least so far as I know. Nor is, “If you can walk away from it, then it was good gun handling”. Maybe that does apply to rocketry though.
One round skipped off the ground just a few yards from the guy walking in front of the truck. I guess he had a memorable day.
It reminds me of a W.W II story in which an American unit was taking heavy artillery fire. Their commander, realizing that it was friendly fire, reassured his troops saying, “Don’t worry, Boys; those are our guns!” or something to that effect.