it's a course call ed prancer-size. so ridiculous. prancer-size -- it's described as springy rhythmic way of moving forward similar to a horse's gait and ideally induced by elation. and elation is exactly what one feels when watching one ms. joan rohrback demonstrate the proper way to prancer-size. >> i've got my ankle weights in place, and my music's ready. so let's stop talking and do some walking. ♪ >> i mean, i really -- i thought this was a "saturday night live" skit. it's not. you can prancer-size apparently anywhere, if you dare. the sidewalk, at the mall, on a serene path in the woods, even on the "today" show. >> you're going to go forward rhythmically.