[Behind The Scenes Video] The Making Of A Cover Shot With Supermodel Coco Rocha

This isn't "hopping". She knows exactly which poses work well on camera, which direction to look, how to hold the hands, where to place the feet, how to keep the face relaxed and expressive even when concentrating and so on. It looks easy, but it is actually extremely difficult.
A model of that caliber has a repertoire of poses, she could keep doing this for a several hundred shots at that speed without repeating or mirroring previous ones or taking pauses to think. She controls what she eats (clothes used for fashion shoots have standardized sizes, so she can't be too fat and she can't be too skinny or the clothes won't fit). She does extensive, hard and targeted workout so her body looks great and so she can keep the "hopping" up for quite some time without getting sweaty or needing a break. She makes sure she sleeps enough to look great even though she has to deal with jetlag several times a month and has lots of stress and an extremely busy schedule. She has her eyes open in all shots even though she is being blasted at by an extremely powerful fan. She jumps in shoes that are most likely uncomfortable and don't even fit her feet. She adjusts to what the photographer and a dozen other people ask of her, knows how she can move based on the photographer's framing and can take direction without needing to break the shooting rhythm. She keeps a positive attitude no matter how stressful her day has been so far, how much pressure the team is under and how the atmosphere on set is (this is priceless). She can deliver consistently on that level no matter if she is feeling well or not that day. She doesn't complain at all if you have her in Hair & Makeup for five hours, and after that she can still do this thing. She has and maintains a personality that is special, recognizable, and consistent no matter who she works with, always giving you something that is unmistakably her, yet she is flexible and versatile and can adapt to any situation and look you want. And "hopping" is only a very small part of what she does, she has to deal with business. A model isn't just a person, they are running a small company. Someone has to deal with contracts, politics, paparazzi, agents, clients, managers, scheduling, travelling, licensing, and so on.

I have the utmost respect for someone who can do all that, manage a team and look amazing and effortless doing it while consistently delivering work on such a high level.

Every single one of these images would work as the cover. Just think about that. If circumstances dictate it (say you're shooting on a tropical island but the weather is a disaster and you only have 10 seconds total to shoot where the sun comes out) and messing up is not an option, you can make it happen with this model. That is my definition of working for one's money, no need to look it up.