I have to agree with @dchris that the guy simply passed out, and with @carbiduis that the XR is fake.
Notice that, before falling, the guy goes still for a moment, then becomes wobbly, and finally tips over to the side. If he had sustained the injury suggested by the XR, he would have instantly lost all muscle tone below the level of the injury, and would have fallen straight to the floor as if he'd been shot through the spine.
As for the XR...My favorite aspect is the spinous process that has been fractured along with the vertebral body. (The spinous processes are the bright white bodies to the right of the vertebral bodies.) The only mechanism of injury that comes to mind that could produce this XR is if the individual were cut in half with a samurai sword.
No wait, I've changed my mind. My new favorite aspect of the XR is the fact that the guy has no ribs. (Maybe he's a snake?)