When a zoo in the Netherlands decided to spy on its chimpanzees using a drone it wasn't expecting a fight.
But one clever chimp decided he wasn't going to put up with an intruder and whacked the drone to the ground from a tree.
A video, filmed at Burgers' Zoo in Arnhem, shows the drone falling to the ground and other chimps in the enclosure inspecting the strange object.
According to The Huffington Post, researchers at the zoo were filming animals in their habitat as part of an ongoing series.
Posting the video on YouTube, the zoo explained that while the drone was destroyed after being punched out of the air, the GoPro attached captured amazing footage of the intelligent animals, the Daily Telegraph reports.
In 2012, a five-strong group of clever chimpanzees caused panic at a German zoo after escaping from their enclosure.
The chimps found branches in the pen, which had been left from recent gardening work, and fashioned them into a makeshift ladder to escape their enclosure yesterday.
Around 2,500 people were evacuated from the Hanover Adventure Zoo, and a five-year-old girl was hurt when she was knocked over by the chimpanzees in their bid for freedom.
The little girl was taken to hospital with light head wounds, but was not seriously injured.