According to National Geographic’s list of 15 Deadly Animal Facts, the hippo is extremely unpredictable and the most dangerous mammal in Africa – a continent that's home to lions, hyenas and cheetahs. Responsible for more human deaths than any other mammal, hippos have also been known to kill crocodiles.

So, the following video may take you by surprise:

*edit, please watch the WHOLE video. The zebra appears at 1.05

Proving compassion doesn’t just exist in humans, you see a hippo seemingly assist a drowning zebra across a river, nudging it over towards the bank until it’s able to clamber out. It's no precursor to an attack either, the hippo heads back into the water once the zebra is safely on the other side.