You have not given enough context to figure out what strange situation this person is in, so all I can surmise is that he used the wrapped reins to create leverage so that he could push with his feet and thus attain a standing position; he then carried the rein ends to near his ears to create further leverage of some kind that caused some reaction from his twisting his torso.
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enoon His fists were near his ears, elbows out, as he worked the kinks out.Aha!