Swan station inmates used the riddle "What did one snowman say to the other snowman?" as a passphrase to confirm replacements' identities. Kelvin and Desmond each asked the question when they encountered an unknown intruder, Desmond and Locke respectively. Each presented the phrase after first asking "Are you him?", and each was disappointed when the intruder showed no recognition. ("Live Together, Die Alone, Part 1") ("Adrift")
The expected response, as Desmond explained to Locke some weeks after their first meeting, was "Smells like carrots." ("Live Together, Die Alone, Part 1") Viewers proposed alternate answers, including "Freeze," "Chill," "Ice to see you," and "We're stuck in a bloody snow globe!"
- An Easter Egg on the 7th "extras" DVD of Season 2 shows videotape footage of Dominic Monaghan in 2005, casually telling the joke to cast and crew on the beach. The punchline he uses is "Does it smell like carrots?" There are a few chuckles, and he says, "Silly, I know."
- Its use is similar to the Shadow of the statue question used by Ilana's group personnel, to acknowledge each other as part of Jacob's followers.