Kept expecting a cliff or mountain. Smash!
I just realized that I was kinda hoping he would get smushed, and now I feel bad about myself. Very good animation. Also, I agree with dato63. It does remind me of kiwi (a video about a kiwi bird simulating flight). You did a great job. When I saw the cheese graters, I thought "uh-oh!" Like whynotwhocares said, it was a good "double twist ending".
Wow, I quoted two people and referred to a video in one response! That's a first for me.