I don't think the FAA would allow it. Imagine turbulence and suddenly 20 people get thrown a few inches into the air and come crashing back down. Not safe at al

I don't think the FAA would allow it. Imagine turbulence and suddenly 20 people get thrown a few inches into the air and come crashing back down. Not safe at all, plus that would feel scary to passengers. You'd also need to find a way to secure them into their bunks to not get thrown to the sides.