ssetta, I can remember a funny closing sequence from a sesame street rerun from 23, that i think was reran in season 25. The harmonica theme was still used at the end. The closing theme played while Gina was hiding behind the staircase to the left of the NO PARKING doors. She announced the episodes sponsors--the number of the day was 16--then the sound of a horse neighing was heard (at i think that's what it was). Then the SESAME STREET sign and CHILDREN'S TELEVISION WORKSHOP appeared on the screen in a different style. Instead of the SS sign folding outward then CTW words sliding underneath the sign, The SS and CTW word slid left together on to the screen into the upper right corner. Then as Big Bird was chasing Gina, she said Sesame Street is a production of the CTW really, really, fast. It sounded like this: Sesamesaproductionofchildren'stelevisionworkshop,
Then the logo slid to the right off of the screen as Big Bird's beak touched the word CHILDREN'S.
Which episode was it? When I looked at the muppet wiki, the closest episode description to this was #2926: Word play on Sesame Street. The sponsors were J, Q, and 16, yet I seem to remember the letter sponsors being A and S