I can be rather clumsy when I'm not paying attention to myself. but this could be related to a part of my type. I'm clumsy sometimes because I'm using extroverted sensing, but not sensing where I am in space, just everything else. Ti also plays into this when I'm doing something, and then suddenly have a great idea that I want to think about which causes an all stop on everything externally. If I'm holding something at a time like this, it can slip from my numb fingers easily enough.