Clara aimlessly drew rings on the counter of the fifties diner as she leaned her head on her hand and stared out of the window. She was looking at the primordial stew that was the birthplace of life on Earth, thinking about her situation. She faced the possibility of "living" an eternity in the time between her last heart beat and what comes next. The swinging door that should lead to the kitchen swung open revealing the Type 42 TARDIS default control room; Ashildr entered.
"Where do you want to go?" She had a cheeky smile on her boyish face, "All of time and space and we end up back here, no imagination."
"Just a few more minutes," Clara moved around the counter, then to the window, touching the glass panel separating her from the hostile environment outside. "You can live forever, do you ever think about it," she tried to clarify her thoughts in her head, "You can never have a real relationship, never have friends. I think I understand the Doctor better now than I ever have.
"I feel like Schrodinger's cat," referring to the Austrian physicist's thought experiment, "Only, in my case: I am alive. I am dead. And here, now, I never really existed at all."
"You think too much, schoolteacher. Let's go somewhere." She laughed, "We need to find a party."
Clara smiled at the reflection of Me, she liked this girl. She was-will be murdered by her companion although that was a billion years in the girl's past, to Clara, it was more immediate. This was a bitter sweet situation, Clara adapted.
Looking back out at the desolate scene, she made a conscious decision; dead, not down. Turning her back on the younger version of her home planet. She followed Ashildr back into the control room and asked her, "where are the best parties?" Entering in the coordinates, the Norse girl cheered as she activated the time drive.