He'd had enough.
Last week, a 24-year-old chimpanzee from the Yagiyama Zoological Park in Sendai, Japan, decided that he wanted to see beyond the walls of his enclosure. So he ran away from the zoo.
Nobody knows how he did it.
After escaping, Cha Cha fled from authorities by climbing an electrical wire high above the ground. While the humans used a boom lift to reach him, Cha Cha used nothing more than his hands, feet and will to summit the pole.
After about an hour at the scene, officials darted Cha Cha with a sedative.