DALLAS (CBSDFW.COM) — It’s not uncommon for a group of children to taunt an animal through the glass at the zoo. But when the animals react, everyone’s surprised.

B’Wenzi, an 11-year-old male gorilla at the Dallas Zoo, threw his hands up against the glass window, surprising a group of screaming children.

“This is normal, well-adjusted behavior for a teenager,” said Dr. Lynn Kramer, vice president of animal operations for the Dallas Zoo. “They do this for one reason, and that’s to get a reaction.”

The zoo says the actions aren’t aggressive. The jeering children might disagree.

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