improviser: (n) one who invents, composes, or performs with little or no preparation

laboratory: (n) a place for practice, observation, and testing

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dancing: (v) to leap or skip about excitedly; to bob up and down; to move rhythmically usually to music, using prescribed or improvised steps and gestures

goat: (n) a hollow-horned, bearded ruminant mammal, originally of mountainous areas of the Old World