1988 - Stupid Human Tricks (Dave Does One)
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Stupid Human Tricks 9/25/2012, The Late Show w/David Letterman
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Stupid Pet Tricks.. One Real Smart Dog and One That Tries Hard:)
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Stupid Human Tricks on Letterman, May 26, 1986
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Fan Request: The Amazing Regurgitator Swallows Light Bulbs And More | Letterman
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Letterman | Stupid Human Tricks | 1987
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Kids Tell Jokes on Letterman, June 9, 1992
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