Even though she quit, it's the act of a group of people walking you out like you're a criminal or something. Some places might throw a going away party for someone to show respect for your time there.
I'm always fascinated by the random conversations that are had while working on something. BTW if you want to learn more about his tabletop game Hivernation he made this video https://youtu.be/k66a6K09Opk