This is something I worry about also, I did find this you tube vid about this camper falling over. The camper jack may have been weak, wind or some other outside force could have contributed to the camper falling over. This guy seems to think that the camper being loaded with weighted items in the bed area was the cause. The video starts pretty slow, but if you can stick with it, he finally gets to the idea of the video".Uprighting The Fallen Truck Camper" is the title of the video. I would guess there are others.
Just something to check out.