No monkey business at a Japanese zoo as an emergency drill simulates a scenario where the zoo's gorillas escape -- following an earthquake.
A staff member in a gorilla costume ran through the zoo before being capture with nets and being fake sedated.
More than 150 members of the zoo's staff were joined by local police and fire departments during the drill.
"When you're doing everyday work as part of a routine," says the zoo's director, "You forget what it's like when something out of the ordinary happens."
The zoo has had escape scares in the past -- including a monkey that escaped from its enclosure in 2010.
It holds "animal escape" drills every two years.
Previous drills have included the simulated escapes of a rhinoceros and a tiger.
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