6 November

I think the fact people often fall to the ground when somebody takes a chair away as they’re sitting shows something important about how we use our bodies. Even in this drawing, you can see the sitting person is way off balance as they’re going to sit, their centre of mass is significantly behind their supporting surface - their feet. People tend to fall into chairs, rather than simply change shape and remain supported the whole time. And when they go to get ‘up’, they try to get from from their seated support to a standing support immediately, rather than again simply changing shape and staying in support the whole way. The ‘effort’ they feel has nothing to do with their weight, but with protecting them from falling.