First of all I do not believe in Hypotheses based "Truths" ... Secondly, why should I be in the woods, in vicinity of falling trees when I have a house to live in ... and thirdly, supposing I am in the Woods, for such, as hunting, when a tree falls ... The Truth is, that it is for the Natural inhabitants of the Woods, to first hear a tree fall ... and then do, whats to be done ... I will stay clear, when I see a tree, thats most likely to fall. P.S. if its the tree shown in your Picture, please note its just "leaning" against the neighboring tree ... and the shown is not my idea of a Wood, its more along lines of a Coniferous Forest .