A woman is standing by a bathroom door talking.   The same woman is now seen on a stationary bicycle teaching a spin class.  Several other people in the class can be seen on stationary bicycles in the mirror behind the instructor.   The woman is then shown on the ground demonstrating an exercise.  The spin class is shown again still in progress.  The instructor then does floor exercises again with the class following along.   The instructor and the class finish on the bikes again.