http://news.yahoo.com/s/ap/20090309/ap_on_sc/eu_sci_sweden_angry_chimp

"Santino the chimpanzee's anti-social behavior stunned both visitors and keepers at the Furuvik Zoo but fascinated researchers because it was so carefully prepared."

people are so stupid they assumed only humans can think ahead till now?

some great quotes form article:

'For a while, zoo keepers tried locking Santino up in the morning so he couldn't collect ammunition for his assaults, but he remained aggressive.'

'It is extremely frustrating for him that there are people out of his reach who are pointing at him and laughing," Osvath said. "It cannot be good to be so furious all the time."'

I meant throws rocks at people at zoo sorry for that lol.