If you try to breathe, normal, in through the nose out through the mouth, you know your breath will stutter, come out in a gulping, unsteady way
Because your heart is too fast (as always) Your mind is too unclear, stuck in a haze of fog.
So you will breathe through only your nose, keep the panic curled and tight until you are all alone, and it can lash out fast and furious, and harm no one but you.