Most people think that a huge amount of frames is making the animation smooth thus beatifull... but what you forget is that if you do a movemet like cells like now, with for example 100 frames it goes smooth, but incredible slow...
Just use 5 or 7 frames for that, and set the speed to 0,2 or 0,1 seccond per frame.
Now its just like that cell is a floating balloon!, well better luck next time.