This drawing is from the cover of Mickey Mouse Magazine #4 from 1935. Like my earlier "Surprised Mickey" post, I've included the initial pencil drawing, inked drawing, and the final photoshopped version so you can see my drawing in process.
I've included the pencil draft, inked, and final photoshopped images so you can see how the "Surprised Mickey" drawing progressed.
I'm not sure what this image originally came is from, other than it was in the corner of my animated Disney desk calendar for the week of February 6-12. Regardless, I think it's a pretty funny Mickey picture.