We were camping in the popup, snug in bed with our Flat Coated Retriever Beau on his bed on the other end. Well, Beau was scratching and the popup was shaking like crazy. All of a sudden it stops and there is a bit of a thud. DH asks for flashlight, looks at other end and no Beau. Well, go and open the door and there is the dog, with a look on his face like 'hey, what happened?'. We had not hooked the bungee on his bed end, and he fell out of the camper.
We had this happen, except it was my 5 year old son that fell out :) Luckily he wasn't hurt, just a little stunned. The bungees were done up though.