He ends up coughing up blood, perfectly normal when qi gets blocked in some way or another (define normal, Wei Wuxian), but it's not until the shot comes from Faux that he manages to finish writing the strokes for fire with his own blood, sending it up the ribbon he'd held onto, and at a cluster coming at them as Lea was at the controls.

When the light and crack came, he was behind the red haired man, and quite possibly reached out to try and support his back when they did rather abruptly go flying back.

Because his first instinct is to protect someone from injury if he can, even if it's just with himself.

(The loaned gun, unfortunately, is lost to him in that moment regardless of his success or failure.)