Before we get to today's quote, it should be mentioned that before it comes up in the script, the script indicates after yesterday's dropped quote that Joe kisses Carolyn again, but she turns pensive. It's at that point that today's quote -
Page 16 - Joe (CONT'D): 'Whoa. These mood-swings could give a guy whiplash. (more serious) What is it? Roger again?
- comes up. However, all of today's quote does not appear in the pilot because also dropped is "Whoa. These mood-swings could give a guy whiplash."
What actually happens in the pilot is that after Carolyn laughingly remarks that Joe's decision to go off on an extended fishing trip is what prompted their extremely amorous (and porthole fogging) makeout session, her mood suddenly becomes pensive. It's at that point that Joe becomes serious and asks "What is it?" and then immediately theorizes "It's Roger again."