SandorsRedemption

Is it me or does this chapter hint at Arya having had some combat training? The way she kills Raff the Sweetling by cutting him in his thigh without having any worries of him being able to get up and attack her seems odd for a 12 year old unless she knew exactly what she was doing. Does this mean there is more to Izembarro or his group of mummers, or did someone at the house of black and white teach her?