This video shows the moment a silverback gorilla almost smashes the glass to his enclosure after a little girl beats her chest at him.
The little girl apparently thought that it would be a good idea to beat her chest as a kind gesture to say hello, just as many little kids would, but what it actually means is a sign of dominance. The result is a pretty terrifying video and a reminder to everyone - don't beat your chest at a gorilla!
Everything was fine until the gorilla spotted the little girl beating her chest.
Even this sight would have us running away! He starts to charge towards the glass...
...and almost smashes his way through. As you would expect the family leave swiftly.