 And they're afraid of their foot placement because they've lost the ability to identify the foundation. We see parking lot, sidewalk, carpet. We identify it. They used to. They get to a point where they don't know. It looks ominous. They're not so sure. Should you even step on it? Will you fall in? Now, is that Parkinson's? Is that Alzheimer's? Is it cumulative mini strokes? I don't really care.