He was behind her on line with his arms around her neck like a clingy boyfriend, by the time the blood spurted, it was too late for anyone to do anything to help her. The quick thinking manager shepherded the customers and employees into the kitchen, instructing them to call 911. She returned to the dining area to help the girl, but the head was gone. She returned to the kitchen.
Thanks for the added details, gruesome as they are. Maybe this will put to rest the absurd notion among many on this forum that the killing happened in a crowded restaurant and that everybody just sat around and let this guy hack the girl’s head off unopposed.