Children are socially perceived as the most vulnerable and innocent people and we instantly feel the need to protect them. There are loads of photos where children impersonate adult behavior, however the usual purpose is comic. In this case, the child is seen as involved in an aggressive sport, which may connote issues like child abuse and domestic violence.
Leaving aside the layered meaning of the image, the photograph has great lighting. The shadowy back of the child harmoniously frames the area where the water drops.