Watch two huge gorillas trade blows in furious zoo enclosure punch-up

Visitors watched in horror as the hulking primates grappled at Henry Doorly zoo in Omaha, NebraskaVisitors at an American zoo got more than they bargained for when two gorillas went head to head in a furious punch-up. The footage shows the moment the gorillas traded punches as their fight played out in the middle of their glassed enclosure at Henry Doorly zoo in Omaha, Nebraska. Onlookers yelled for zoo keepers to intervene as the herbivorous apes went head to head in a battle that resembled a boxing match. Initially the pair were filmed running around before they eventually traded blows, showing their teeth before they both ran off in a fit of temper.This is not the first time the temperamental apes have put on a scare show for toursists. Last year one of the zoo's silverback gorillas went bananas running up to a viewing window and landing a massive punch. The hefty beast cracked a glass pane in front of a terrified family who caught the entire episode on camera. Read more: Animal magic shows the true wonder of nature in wildlife photography contes t