Jim Moss mentions that he went to "SERE school". SERE (Survival, Evasion, Resistance and Escape) is a military program with grueling survival courses that educates service members with the skills needed in the possible event of capture by enemy forces. However, it is pronounced as "sear", rather than "Siri" as Jim does in the episode.
Sarah's ring tone is the letter "f" in Morse code (short-short-long-short).