Stupid Pet Tricks on Letterman, August 10, 1982
9:19
Stupid Pet Tricks on Letterman, March 29, 1984
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Stupid Human Tricks on Letterman, May 26, 1986
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Stupid Pet Tricks.. One Real Smart Dog and One That Tries Hard:)
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Stupid Pet Tricks on Letterman, February 19, 1987
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Bonnie Jacobson and Ginger: Stupid Pet Tricks, Late Night with David Letterman 12/3/1982
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The First Stupid Human Tricks On "Late Night" | Letterman
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David Letterman Kid Scientist Volume 6 2009
9:47