This is the moment a huge silver back gorilla showed visitors at a Nebraskan zoo that it was sick of being stared at when it nearly broke through its enclosure window in an attempt to charge a young girl.
In the 20-second clip titled "A three inch piece of glass between life and death", the little girl is filmed beating her chest and making noises at the gorillas from behind the safety of the enclosure's viewing window.
In the background, the girl's family can be heard laughing as she continues to goad the animals.
However, not everyone is as amused, and within seconds one of the enclosure's gorillas begins charging towards the glass and at the little girl.