I will not go into the same reasons the others have given for liking this Flash submission. To say them all again would be redundant.
But no one has touch upon how emotionally moving this piece is. I think most here view Interactivity as being something that only applies to games. If a Flash video has can touch your emotional inner self, then it has interacted with you a far meaningfully then any game can. This is why I gave it a 9 for Interactivity.
Excellant story, Excellant flash!!