I have always found curious why elephant prefer to get on their knees and use their head in a rather clumsily way when they could simply stomp anything down with their front feet.
That was a very thin and sick buffalo. It didn't have a chance at escape. Looks like out of hopelessness it tried to defend itself at the last moment but was way out gunned. Strange that the elephant appeared to have charged from a good ways off. Very over aggressive elephant. I have seen where an old domestic cow crossing a small creek channel fell down as she started uphill to get out of it. The downward inertia of her own weight took her down and she never got back up and died right there. This old buff was in that same kind of condition.