One thing that struck me when I was first looking at the AccelerationRatio and DecelerationRatio properties in animations, was whether they could be combined to give the animation a double wobble?!?
Of course is the answer.
In the following example, observe how the bottom ellipse is out of step with the top ellipse.
The bottom ellipse is having an acceleration factor and a deceleration factor applied to it, which gives it a curved animation: