They may eat grass but do not underestimate the strength of buffalo, especially when they are in group. Making this mistake a lioness had to pay the price. This unbelievable video shows how a group of buffalo killed a lioness. Surrounded by a group of buffalo this lioness could not save her. The buffalo were really fierce and they continuously struck and hit the lioness with the horns and also tossed it in the air. Due to the united assault by the group of the buffalo the lioness ultimately succumbed to death. Watch it to see the details.