Dometic Microwave fell off wall while driving!

Our microwave didn't fall off, but our stove hood did. Luckily right in the driveway as we returned from a trip. The mistake was in the mounting, they missed the framed area on one side and it was just screwed to the thin plywood. It was not difficult to fix, I just put screws in that actually met the wood framing. I used cardboard boxes to hold it up while I was screwing it back in. But there was no warning, I never noticed it was loose until it fell off!