Footage has emerged showing a gorilla venting his frustration at not being allowed inside by jumping on his son at Twycross zoo, England.<br /><br />The video shows the silverback gorilla peering into his locked indoor enclosure before taking his aggression out on the smaller primate, who was unhurt in the incident.<br /><br />The filmer later explained that the gorillas were agitated as their indoor enclosure was being fitted with a new climbing frame, preventing them from wandering as freely as usual.
