Reading through the posts on this thread, I have seen a couple mentions to the hand drawing a bridge for a train to go across. On that angle, does anyone remember the animated drawing of a guitar player (with guitar) that slowly composes on screen with a backdrop of an outdoor promenade. Beautiful acoustic guitar music completes the prettiness of this cartoon. If I were to guess, this was from the late 80's.
One more just came to mind, and given it's content and context, had to be from SS's earliest days... The cartoon opens with a shot of a bedroom wall, with a pin up album cover of a popular singer (remember when you could go to a record store and buy these for cents on the dollar?). Background music is something like mod-Rock, and a male vocal sings "La la la la la la la LAAAAAA" Then two teenage catcalling female VO's come in: "Oh, Daddy!", "He's so beautiful, He's so handsome!" Eventually by cartoon's end, you see most of the girls' bedroom with tons of album covers on the wall, with one more "Oh, Daddy!" and a final serenade of "La la la la" from the rock artist.
I understand that SS was set in the Bronx, which is obviously a very urban area, but it seems that there was an obsession with "Bus Stop" on the show. More than one cartoon was made about such, and a nice R&B song in the mid 80's.