Everybody loves elephants. The biggest living land animals in the world, they are beautiful creatures that are revered worldwide. Although generally thought of as gentle animals, they are actually incredibly dangerous — which can be mostly attributed to their impressive size — although there are times when elephants can be frighteningly aggressive too. And I mean aggressive.

Like seriously, you do not want to get in the way of an elephant that got out of bed on the wrong side. Weighing in at 10,000 to 13,000 pounds, and capable of reaching speeds of around 25 mph, getting hit by an elephant at full speed is similar to being hit by a truck. Except a truck doesn’t have two piercing tusks.

In this video, a poor buffalo gets this lesson first-hand, as a bull elephant smashes into it, using his tusks to stab and kill the buffalo. Happening in front of a group of tourists in Kruger National Park, this unprovoked attack really shows how brutal nature can be.

While it’s not clear why the elephant was acting so aggressively, it’s very likely that the elephant was in the midst of a recurring condition known as “depression”, where bull elephants have elevated testosterone levels. Although this was supposed to be for breeding purposes, it did have a stimulating effect on the elephant – it was very aggressive.

Another reason speculated by the video’s publisher, Kruger Sightings, is that the elephant is protecting a watering hole from a herd of buffalo, although this territorial behavior is unlike that of elephants that live a nomadic lifestyle. It can be a combination of the two, with contemplation increasing the elephant’s response.