What does "this" refer to here?
You can think of Chandler as having omitted the word "situation" from this sentence. In this video, "this" is referring to the current situation, which is so stressful to Chandler that he has taken up smoking again. Thus, you can understand the sentence as meaning "this situation/incident is just like my parents' divorce ..." Ex: This is just like the last time you had a fight with your parents. (This = situation, incident) Ex: Doesn't this remind you of that time you got arrested? (This = situation, incident)