ChaCha became the most famous chimpanzee in the world when he made his way out of the Yagiyama Zoological Park in Japan and wreaked havoc for two full hours. ChaCha scaled powerlines after the escape. As the tranquilizer took effect, the chimp would not give up. He lets loose a furious howl at the people below and then fell. Workers below tried to catch the chimp in a tarp but failed. He crashed through the tarp - but thankfully, was not injured.