Ellie had her own nitrogen burns - drops on her forehead and neck, and the back of her hands - from when her hood had been down. So when she hears the alarm go off her first instinct is to get as far the fuck away from it that she possibly could - and then she heard Howard's voice.

"Howard!" The cry is ripped from her lips before she can stop it, and she's running toward the shriek, pulling out her bow.