I risked my life and took Ziggy, my cat, and made him into... a ball. I marked the floor, with paper, with the general path of action of a bouncing ball. Then I placed, sweet darling Ziggy, aligning him to those marks. I then took those images and re-aligned them in Photoshop to compensate for his wanderings. I imported those images into Premiere, adjusted the timing, inserted a sweet jam, and Tada - video!