Leela tried to scream, cry out for help, fight off her assailant, but her voice was silenced by Faith's grip on her neck. But despite her best attempts to fight for her life, it was snuffed out in a single instant. Her neck snapped and her body fell limp against the ground. Having been locked within a dark world, the passage into death wasn't a shocking one. At least she didn't have to deal with her world suddenly going black. But it was incredibly frightening and jarring. But in that one instant, Leela was finally free of the Hell she had been living in. No longer would she have to deal with the torment that her life had become. Now, she could finally be at peace.
K-9 was jarred a bit from the punch and hitting the tree. "Mistress!" K-9 exclaimed, returning to Leela's side. When he got no response and Faith had fled, K-9 went off to alert the necessary people to what had happened. And now, he no longer knew what to do as his Mistress was dead.