She just jumped vertically upward. Not a far distance, but she tucked her legs in and curled up into a ball almost to reduce her silhouette and height. The sword would've passed by under her, whereupon she re extends her legs as she comes back down, making her first contact her feet, which comes in a very short amount of time than an actually straight up vertical jump. 

If you've ever, like, done squat jumps before, then you'll understand a bit better. 

But whatever. Not like I'm gonna win. Just gonna wait then edit with a sword clash instead of an avoid.