A gorilla at Berlin Zoo showed a group of Irish tourists exactly what he thought of them - by throwing a rock directly at them.
The tourists were taking a video of the gorilla, marvelling at how "impressive" he is, before he suddenly turns around and angrily lunges at rock at them.
The video was uploaded to YouTube by Stefan Nolan, who wrote: "My friends and I took a trip to Berlin Zoo to pass the time while waiting for our flight home to Ireland.
"Apparently gorillas aren't a fan of the Irish..."
Responses to the video on YouTube express more concern for the gorilla than for the visitors.
One user wrote: "Put me in a cage and I'll throw worse things at you."
Another said: "In my experience the animals in Berlin Zoo aren't the happiest. A lot seem quite stressed. You were quite lucky you didn't get hit."
One lady added: "You see he casually picks up the stone. By not looking in their direction while doing so, he makes sure these guys don't see what he intends to do. This is a smart animal that thinks ahead.
"I don't like zoos; wild animals should live in the wild. This is so sad. He has every right to throw that stone. Heck, I would throw that stone too."
And one user made a joke about Nolan's filming skills, writing: "He knew the video was being filmed vertically."