To Silas Kessler:
Several caricatures of movie stars appear. The parade of celebrities who emerge from their limousines are (in order of appearance) Oliver Hardy, Stan Laurel, Jimmy Durante, Buster Keaton, Lionel Barrymore (as Rasputin), Groucho Marx, Chico Marx, Harpo Marx, Zeppo Marx and Mae West. In the drug store, Joe E. Brown is the big-mouthed man who wants cake. Later, an effeminate man drinks a concoction that turns him into Mr. Hyde as played by Fredric March in Dr. Jekyll and Mr. Hyde.
It's wonderful as a young man of 17 years old is so interested in old music and old cartoons!
I wish more young people were!

However i did not recognize all the celebity caricatures. I recognized Laurel and Hardy, Jimmy Durante, and The Marx Brothers. But that's all! Can anyone tell me who else was on here?