Not Bad
The Good: Nicely portraid the Nike commercial. Very well done timing wise.
The Bad: The basketball sounds like a cannon shot in the audio. Basically, the basketball dribbling sound could be toned down a bit. A replay button and a "Done by me!" kinda thing would help at the end also.
The Ugly: ...
So all around average job. Not bad.
I don't make flash movies, I make em' better.™