Here is the video that finally solves the urban legend of the suicide in the wizard of oz. Enjoy.
www.youtube.com/watch?v=tgrcY3crM38

This is supposedly how it happened.
Way in the background at the end of the scene where the angry trees shake apples onto Dorothy, the Tin Man, and the Scarecrow, you can see a man who is supposedly hanging himself. As the trio dances off on the yellow brick road singing "We're Off to See the Wizard," you can catch a glimpse of this man supposedly setting out a block, hanging himself, and lastly kicking the block out with his foot." (End Quote)