A school of Strawberry Hussar swim past me and as they do everyone of them checks me out. Their movement is so well coordinated that as I swim between them they part, keeping about a metre away all the time and keeping the distance of a few cm between each other. They all change direction almost simultanously and they never even come close to bumping into one another. It is fascinating to watch the way these groups move as if aware of the position of every other individual around them. If we could learn to do this as well as them, many road accidents could be a avoided.