OK, so I can make this sketch happen:
This is about the Parable of the Mustard Seed:
Statler: OK, stop me if you've heard this one.
Waldorf: OK.
S: This guy sows a bunch of mustard seeds...
W: yeah
S: ...and the seeds go several different places...
W: yeah
S: ...and some go to a rock...
W: yeah
S: ...and some go to a footpath...
W: yeah
S: ...and the rest went into the ground as it should...
W: yeah
S: ...And the mustard seed is our faith.
W: Ya know, I never heard it.
S: You geriatric joker! It's the Parable of the Mustard Seed!
W: Oh boy, my memory must have gotten up and left on me.
S: Crud, my hearing aid went again!
(laughter, applause)
That's it...Try that sketch and leave out the laughter and applause. They might laugh all the way thru it, trust me. Make sure to play up the "joke" as much as possible (ad-libbing is a must).
BJ