Having spent a lot of time around people with East Asian influences, I have come to have an invariably calm demeanour. Even when I'm feeling angry, alarmed or stressed, I make my movements slow and refined. I am often making myself calmer in the process.
But I have noticed there are times when life necessitates quick movements. A reflexive jab at the 'Stop' button on the bus when I realise I need to get off soon, breaking into a sprint to catch a taxi in the rain, frantically searching my bag when I feel like I've lost my keys/transport ticket/bank card.
Then, I think of Barack Obama's sense that making a sudden movement creates anxiety and/or fear in the white or non-black people around him, because in their eyes his blackness automatically makes him suspect.
That was before he was an internationally recognised figure, anyway. His reflections in 'Dreams from my Father' remain relevant to black people living in all the majority non-black countries today I know today.