she should have landed with her face first with a possibility of her neck getting cracked. she's sitting like nothing happened. with mangas, the impossible becomes easily possible hahaha
It's not just manga, it's common to most fictions, especially the "visual" ones, like movies and so on. Characters always get out of falls or crashes with far less injuries that they ought to actually have.
On the other side, it does happens, people getting in accidents and getting out with only scratches and bruises when you thought there's no way they'd survive, in real life.