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.

Also Check Out:

• Local Mugshots
• Young Teens Arrested; Accused Of Attacking Vet
• Actor James Gandolfini Dead At Age 51
• Man Gets Finger Stuck In Car's Gas Tank
• Kids Recovering After Truck Crashes Into House & Lands On Them

MOST VIEWED GALLERIES

• PHOTOS: Your Pet Pictures
• PHOTOS: Severe Weather Aftermath - May 16
• PHOTOS: Dallas Comic Con 2013