When you're at the zoo checking out the silverback gorilla exhibit, you might not want to beat your chest like a gorilla does because he just might end up charging you!

While watching the gorillas in their enclosure, a little girl makes a comment on how one of them was smiling at her and says hi and starts beating her chest, like they do in the wild.

That action apparently upset one of the other gorillas because he ended up charging the window in the exhibit and when he runs into it, it cracks it and scares the little girl and her family, who went immediately running away.

If that weren't scary enough, you can see the full encounter leading up the glass shattering charge next.