Terrifying video shows gorilla smash glass as crowd reacts in disbelief

Visitors at the San Diego Zoo in California were left in shock over the weekend after an animal went bananas. 

Dramatic video shows the moment the western lowland gorilla stormed the tempered glass on Saturday. 

Zoo officials confirmed the incident to the New York Post, noting it was their 10-year-old gorilla named Denny who was responsible. 

The 10-year-old gorilla was in the enclosure with another animal and was not injured. 

The spokesperson added that "bursts of energy, charging, dragging items or running sideways are all natural [behaviors] for a young male."

Males tend to be twice the size of females, with most members of the species living between 35 and 50 years old, according to LAZB. 

The International Fund for Animal Welfare notes that the western lowlands are the smallest of the gorilla species. 

Fox News Digital reached out to the San Diego Zoo for comment.