Lacking peripheral vision on that side, it's only the way the movement translates through the rest of her body that gives her attack away, and Thor pivots quickly, her boot still glancing off his armor though it doesn't connect as solidly as it would've otherwise. That little split-second of needing to turn his head makes enough difference that his attempt to ensnare her leg before she can withdraw it doesn't exactly work out, missing his shot and leaving a momentary gap in his defenses, his sword arm vulnerable to a counterattack.

A rumble of thunder rolls across the sky overhead, and rain begins to fall, soaking into the thirsty earth.