PHOTOS: Escaped gorilla training in Tokyo

Zookeepers hold a net to capture an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526700370 )

A zookeeper (top C) aims a tranquilizer gun towards an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526704507 )

Zookeepers hold a net to capture an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526704489 )

Zookeepers hold a net to capture an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526704479 )

A zookeeper (top C) aims a tranquilizer gun towards an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526704497 )

Employees at Ueno Zoo uses nets to capture a mock gorilla during an emergency drill in Tokyo, Thursday, Feb. 6, 2014. Ueno Zoo conducted the drill in scenario when a gorilla escapes its cage. (AP Photo/Shizuo Kambayashi) ( Japan Zoo Drill )

Zookeepers check a an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526704514 )

Zookeepers carry an animal keeper dressed in a gorilla costume during a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526704525 )

Zookeepers hold a meeting after a drill to practice what to do in the event of an animal escape at the Ueno zoo in Tokyo on February 6, 2014. About 70 zookeepers participated in the annual drill. AFP PHOTO / KAZUHIRO NOGI/AFP/Getty Images ( 526704538 )