What did one snowman say to the other snowman?
This question Kelvin posed to Desmond but haven’t we heard it before? Hasn’t Locke said it? Additionally, wasn’t it told to Michael in the hospital?
This Joke was actually told in one of the episodes in season 1. When Michael was in the hospital he wanted to send a card to Walt but didnt know what to write. So the Nurse told him to draw a picture and put in a joke “what did the snowman say to the other snowman?” The answer was Freeze.