Monkeying around – Staff at Japan's Ueno Zoo practiced capturing escaped animals by chasing around one of their colleagues wearing a gorilla suit.
Monkeying around – Visitors gaped as scores of helmet-wearing keepers surrounded the "gorilla" with cars and nets.
Monkeying around – Staff then pretended to tranquilize their coworker, who swooned dramatically and collapsed to the ground.
Monkeying around – The acting ape was immediately wrapped in a large net and hauled away on a truck.
Monkeying around – "I tried to feel what an animal might feel and realized when they were on the run they would be scared," said zookeeper Natsumi Uno, who wore the costume.
Rip-off rhino – In 2004, the zoo practiced using two men dressed up in a papier-mâché rhinoceros costume.
Not impressed – This real gorilla from the Ueno Zoo finds nothing to get so excited about.