This was shot in Kluane National Park in the Yukon where I live. It is a multiple exposure. The trunks of the aspens seem to sway and their bare branches flow like hair in water. In my imagination, they look like they are having a rave up at a disco party, twisting and shouting to some music I can't hear. Less poetically, it's the effect of the prevailing winds on the development of the trees.