Its for those rich folks who feel the need to flaunt their wealth by literally tossing their table scrapes down to the rest of us on Earth. Although it does look fairly safe as per hvymetal86 noted with the restraints, I still feel like this would be one of those Monty Python inspired ideas. I mean what if halfway through dinner you get the runs? I have a feeling it takes a good few minutes, minute you don’t have with the runs, for the dining area to be lowered back down. And from that top picture I fail to see any rest rooms.