Notice how the camera starts to move as she sweeps him with that muzzle? That is because the person holding the camera knows how close they just came to dying.
Only point your firearm at thing you intend to destroy.
Always keep your muzzle pointed downrange. All the time, every time.
Be safe at their people – because this is how a moment of poor training turns into tragedy, and the reality is the person to blame is the person who handed this young lady a firearm without teaching her the correct way to handle it.