Lol, dying from someone falling onto you from a tree... and what's more, the way it was portrayed is absolutely retarded. She looked like she wasa few metres away from the tree when she talk to him and she was even walking away when he fell, so unless the motherfucker jumped towards her, he should have hit her. Anyways, I guess it's possible to die from that if the person falls on your neck (like flying kick to the neck from a few metres high) or well, anything that ends up with you breaking your neck. Any other injury could eventually lead to your death, but here it seemed like he squashed her to death... like if she gets several bones fractured and poking out of their respective places and then the wounds he infected... Still, I would just say, "she had rotten luck", but at least the way it was drawn here, the male lead shouldn't have fallen on her (she looks like she was to far away for him to fall onto her.)