Why You Are Steadier in the Supermarket Than in Your Own Garden
People who are becoming unsteady usually notice it in a pattern rather than all at once.
Fine on a flat pavement, unsure on grass. Fine in daylight, considerably worse after dark. Fine walking, wobbly standing still in the shower with your eyes closed. And fine with a trolley, uncertain without one. Those patterns are not random. They map precisely onto how balance actually works, and once you understand the system you can work out which part of yours is struggling.
