Don't call this gorilla ugly

23:23, Jun 27 2013
After enduring endless taunts, this gorilla shows visitors to Dallas Zoo who's boss.

Sometimes it pays to respect nature, even when you think it's safely contained behind protective glass.

A group of school children learned this shocking lesson when they decided to tease and taunt a muscular gorilla during a visit to Dallas Zoo.

A video recently posted on YouTube shows the children yelling "you're ugly" at the primate, hoping to get a rise out of it.

At first the gorilla ignored the name-calling and chanting but then snaps when one of the children points a finger at it.

The children's reaction is priceless.