When a prophet by the train tracks does not believe her own prophecy about the train tracks. Chuck’s reply about what Sarah saw by the train tracks refers both to what she saw by the train tracks at the end of 3.11 Final Exam and (indirectly) to the future she saw by the Prague train tracks in 3.01 Pink Slip. Another beautiful example of the density of the dialogue in Chuck.
It’s not that simple. It’s complicated. It’s not real.