Edward G. Robinson and Greta Garbo are together in See Saw Margery Daw. Garbo says, "I vant... so much to be alone". Robinson responds, "Okay, babe, you asked for it!" then dismounts from the see-saw, causing a startled Garbo to fall on her butt!
Garbo falls on her butt
The cartoon was nominated for an Academy Award for Best Animated Short, but lost to another Disney cartoon short, Ferdinand The Bull.
Greta Garbo and Edward G. Robinson
See Saw Margery Daw is a popular English language nursery rhyme, folk song, and playground singing game.
Early sketches of Garbo and Robinson
The cartoon can be found on disc 2 of More Silly Symphonies in the Walt Disney Treasures DVD, released in 2006.
Source: IMDB and Wikipedia