Don't mess with Waterbuffaloes. Especially if they're drinking.
They aren't water buffalo, they are Cape Buffs and are considered the most dangerous game animal in Africa.
This is because of all of the "BIG FIVE" game animals, including lions, leopards, hippos and rhinos the Cape Buffalo are the only ones that cannot be turned from a charge with a non fatal shot. If the hunter doesn't place the slug through the nose and into the brain pan (no chance of penetrating that thick horn "armor" on their skulls) the hunters wind up as toe jam.