Interesting and looks good.
Are you sure there's no sort of tweening involved in this? I really don't believe that as alot of it moves so fluidly that drawing everything that many times, or even just taking clips and moving them, would not have seemed so smooth. If this was a true frame by frame then I tip my hat to you for producing such a well placed vector looking outcome. I also commend you for using frame by frame where you could have saved yourself a terrible amount of work and time had you just went with the tweening wand produced a similar look :D.