Minimal effort, but cute.
There's not much of a story, but the slapstick makes up for the clashing sprite-styles (Yoshi, Yoshi "Oh No" image, the ball, and the background). It might work better if the camera was zoomed in on the character instead of including the entire screen.
Also, the Super Mario RPG sprite used for the "Oh no! What have I done?!" frames was a bit blurry to my eyes.