"It's a birdcage."
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Zach and his brother Gray go into the Restricted Area, in a gyrosphere, despite the order to come back. Shortly after going inside, the recently-escaped Indominus rex attacks and almost kills the two boys. They barely escape by jumping over a waterfall. Owen Grady and their aunt Claire Dearing later go inside to search for them, and find their demolished gyrosphere, with the Indominus's tooth embedded in the vehicle, similar to a scene in the 1975 movie JAWS, where Matt Hooper finds a great white shark's tooth in the hull of a battered boat.