From the Journal of the Royal Society of Medicine:
In his early 40s the torticollis began to worsen and was accompanied by increasing lumbar spine pain as he twisted his torso to compensate for a deviated field of vision. An occupational therapist suggested he try walking backwards, and this he did with some success. . . . Friends nicknamed him ‘The Sidewinder”. . . . He now never walks forwards unless asked.
From the Journal of the Royal Society of Medicine:
Case report here.