Actually based off a mouse we caught and kept. She was extra tiny and ridiculously acrobatic; we've owned a lot of mice before, but none have ever insisted on climbing around on the ceiling of the cage as much as she did. She got so skilled at jumping over a foot onto the ceiling so quickly, she would basically just teleport to it from the floor with zero prep, and then scurry around on it for half the day.
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Like them all, but especially like that mouse! You boiled 'mouse' down SO well to its simplest parts.