I like it!
I'll start off by saying that the title of this flash was awesome.
But that's not very helpful, is it? Plot itself worked fine, but if you're going to do a piece without dialogue, that's reliant on the action completely, you should definitely put emphasis on the characters. Have some fun with it. A lot of the time, particularly near the beginning, the main character's movements seemed a bit stiff and overly-tweened. This improved as the short went on, but it was still there.
But some of the movements could use some more observation. For example, watch a bird in flight. I've never seen them bob up and down while flying. Also, when the character gets up near the dumpster, take a little time and have some fun with it. The action seems to run into itself. Most people don't just push off and wind up on their feet. Maybe have him get to his knees first or something like that? Maybe he could grab his head for a moment and steady himself or wipe off the dirt? Something needs to be in there to make it seem more natural.
Finally, 12 frames per second isn't bad. It's the minimum for the human eye to perceive movement. Most animation (at least traditionally), is shot at 24 frames per second, but each frame is shot twice, so it essentially runs by at 12 FPS.
Anyway, good job! I can't wait to see what you come up with in the future.