I Heard is a 1933 Pre-Code Fleischer Studios animated short film starring Betty Boop, and featuring Koko the Clown and Bimbo.
[1] The cartoon features music by and a special guest appearance from jazz musician Don Redman and his Orchestra.
After lunch is over, the miners all return to work (and reapply their dirt and grime before entering the mine).
The crash leaves her unhurt, but clad only in her lingerie (Bimbo obligingly returns her dress).
The two discover a team of ghosts playing a game of baseball, with a cartoon bomb as the ball.