This is Where We Belong

Just try playin with the concept, I made this work based on the fact that one day we'll be back to the dust when we die. Yeah..that's where we belong, from dust to dust. Still not good enough to me, I can't do better to the dust effects. I hope someone willing to tell me how to make the dust or sand effects. Sorry of my poor English...Hope U understand what I mean.
Model : Ai Takahashi, one of the Morning Musume's personil, I got the stock from