A capuchin monkey was caught using a stone to smash the enclosure’s glass at central China’s Zhengzhou zoo.
The video shows the monkey picking up a stone and smacking it against the enclosure’s glass window.
However, the tempered glass suddenly shattered when the monkey struck it for a second time, scaring the primate away.
According to a visitor, the monkey rubbed the stone on the ground for a while before using it to break the glass.
The zoo has cleared all stones up from the monkey’s enclosure, reports said.
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