Staff at Ueno Zoo in Japan chase after a zookeeper in a gorilla costume during an emergency drill.
Kazuhiro Nogikazu/AFP/Getty Images
2 of 7
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…
Kazuhiro Nogikazu/AFP/Getty Images
3 of 7
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…
Kazuhiro Nogikazu/AFP/Getty Images
4 of 7
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…
Kazuhiro Nogikazu/AFP/Getty Images
5 of 7
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…
Kazuhiro Nogikazu/AFP/Getty Images
6 of 7
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…
Kazuhiro Nogikazu/AFP/Getty Images
7 of 7
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…
Kazuhiro Nogikazu/AFP/Getty Images