If a picture is worth a thousand words, this video is worth a million,
There’s no detail beyond what you see, but really, there’s no need for it. The problems seem to start when the wrestler who got absolutely trucked took a forearm under the chin:
After that, it was over. The poor guy stayed down, not moving, and when he finally tried to get up, you could tell he was literally out on his feet.
Who says sumo isn’t violent?