This is most of the beginning of the tune used in Crank Yankers. This is not the piano 
You can hear this before some of the calls.

s = slide


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----------------------7----------------7------------------------------|
-----9-9-7---5-7-7s9-----9-7--5-7-7s9-----9-7-5-2-0-------------------|
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c'mon c'mon cuz were having a ball..................
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----------------------7----------------7--------------------------------|
-----9-9-7---5-7-7s9-----9-7--5-7-7s9-----9-7-5-2-4-5-------------------|
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c'mon c'mon you can say what you want................
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-----------2------------------2--------2---------2---2------------------|
----5-4-5-----5-4-5-2---5-4-5----5-4-5----5-4-5----5--------------------|
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But it doesn't really matter...................
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-------5-7-7s8-7--5---5---7-5------5-7-7-7-5---5------------------------|
----s7--------------7---7-----7--7-----------7--------------------------|
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Expense of others maybe even your mother................


lyrics to the opening

C'mon C'mon
Cuz were having a ball,
We're just makin' some calls to strangers.
C'mon C'mon
You can say what you want,
And they'll never know if you're deranged or what.
But it doesn't really matter,
No, it doesn't really matter,
Cuz we'll all be doubled over with laughter,
At the expense of others,
Maybe even your mother,
Won't you join the Crank Yankers tonight
CRANK YANKERS!

Enjoy