What are you kickin' about? I am sitting on my mule.
5 seconds sound clip from the The Big Trail (1930) movie soundboard.
You can hear this line at 01:36:49 in the Blu-ray version of the movie.
Quote context
[...]
- Go on there, Jennie! Jennie, go on! Go on, go on!
- Gus, you idiot! You see what you've done?
- You've got my wagon up to the hub in mud!
- What are you kickin' about? I am sitting on my mule.
- Oh!
- But don't worry, Mama. I think it's gonna clear up. There will be no more rain.
- Throw that idiot a rope and help him out of there.
[...]