This is Moo Deng. You can find many photos of her biting knees.

Image

This is the video that still is from, she tries for the knee, but the human is too quick! (Sorry for Reddit link, I can’t find it elsewhere and can’t figure out how to save and post the video on its own)

reddit.com/…/the_pygmy_hippopotamus_is_the_much_s…

And this is a podcast about her.

maximumfun.org/…/moo-deng-and-pygmy-hippos/