The gun's recoil visibly pushing her back is decently conveyed, ditto the hair tossing and turning. I like the pile of spent shells beside her leg, it's unobtrusive in how it's rendered (no shading or outlines) but still reads like an interesting splash of colour to the picture.

Some suggestions: Physically speaking the recoil should affect the chest as well, since it's a mass attached to the torso that's being thrown back and pushing forth to maintain balance. I think the dialogue font could use a drop shadow to help it 'read' better. Also while it makes sense that the lower legs and feet should stay in place for the posture, the legs should still buckle a little bit trying to maintain balance and a centre of gravity.