this happened out of the tub when I was making a turn. Mysocial worker told me about those. I hang on the tub to get out of it. I looked on amazon and didn't see any that were appropriate. then it it is thee standing up and fear of falling. I don't have a mat in the tub. maybe I should bet one but I thought it would be uncomfortable. My legs hurt past my knees.. I will look up mats now