Pretty good.
I REALLY don't think this deserves a freakin 4.24 though. Thats like top 50. You have to admit theres more than 50 flashes on here that are better than this :\. Really. I honestly think this should get around 3.80 maybe.
Anyways. It was pretty good and interesting. Try to make the tricks and physics a little more realistic. He can still do the same things but just the animation of him doing it is a little..bleh. You should practice drawing on paper too, that will help alot.
Good job anyways. Keep it up.