Lisa: High-toned Voice...Bart, That's It! I Know Where Sideshow Bob Is Hiding!

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Lisa: High-toned voice...Bart, that's it! I know where Sideshow Bob is
hiding!
[they start running]
When Bob broadcast that message, his voice was higher then normal.
And what makes your voice high?
Bart: Tight, binding underwear?
Lisa: Helium! Sideshow Bob is in the Duff blimp!
-- Well, they're both right,
"Sideshow Bob's Last Gleaming"

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