Spine

Hi, As unfortunately my illness went to my spine, i had a strange sensation and wondered if anyone else had experienced it too? When I was lying in bed about 3 days into steroids my back/spine kept trying to straighten itself over and over again, automatically and my legs too tried to get parallel. At the time I didn't panic as I had no idea what was going on but I guess it was the lesions in my spine. Did anyone else have anything similar?