When their beloved teacher died, hundreds of students participated in an ancient ritual to honor him. They're not actually angry.

The haka is a time-honored tradition among the aboriginal Maori people of New Zealand. A war dance accompanied by shouts and rhythmic stomping, the haka is also used to welcome guests, acknowledge great accomplishments, or kick off rugby matches. It's an all-purpose dance.

Related: Adorable three-year-old does a haka for his grandmother's birthday.

In some cases, the haka is performed at a funeral to show respect for the deceased. So, the fact that hundreds of students of Palmerston North Boys' High School did it when their teacher Dawson Tamatea died shows how much they really cared about them. Watching this clip without context might look like the start of a riot, but it's actually really touching. This guy was obviously a fantastic teacher.

Sources: Palmerston North Boys' High School