It's a thing that's only being held in that position by chains under tension.
It looks very weird at first, but after looking closer it starts making sense. For the upper piece to fall for instance, the outer chains would have to collapse, but the middle chain makes that impossible. For it to tilt, one chain would need to get longer, but it can't. Etc.
Things like this:
https://img.mrvcdn.com/g/fb/kf/S9514e6355f474ca4b09db84ad4e3...
It's a thing that's only being held in that position by chains under tension.
It looks very weird at first, but after looking closer it starts making sense. For the upper piece to fall for instance, the outer chains would have to collapse, but the middle chain makes that impossible. For it to tilt, one chain would need to get longer, but it can't. Etc.