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| The Amazing Mumford | |||||
| First Appearance | Episode 0455 | ||||
| Broadcast | January 19, 1973 | ||||
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Grover volunteers to assist The Amazing Mumford in his rhyming magic trick, making three things come out of his hat that rhyme with "knee". Grover guesses the first one (key), but doesn't get the last two (ski and tree) right.