Once you get to the 6th checkpoint, simply bailout and squirm around until you fall off the platform onto the floor below. There is a squirrel rotating around a railing, waiting to be found.
Squirrels belong to a large family of small or medium-sized rodents called the Sciuridae. Squirrels are indigenous to the Americas, Eurasia, and Africa and have been introduced to Australia. Anymore questions?
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