Ted insists that Chloe has a crush on Marshall because she always laughs at his bad joke about how they fit a pumpkin into a pumpkin-flavored latte.
Later, when Marshall introduces Chloe to Ted and Barney at the bar, they tell him that she has the "crazy eyes", an indicator of future mental instability.
Later, Marshall takes Chloe back to his apartment and suspects that she broke a picture of him and Lily that was sitting on the end table, and decides to look into her eyes to see whether she is crazy or not.
Lily was the hunchback following Chloe—she was carrying a book bag, then covered herself with a coat to shield herself from the rain hence the hump, and limped because she hit her knee while concentrating on seeing Chloe's face.
Marshall points out the keys and Chloe departs, leaving a nonplussed gang and apparently proving the "crazy eyes" theory.
Staci Krause of IGN said "the whole Swarley joke had gotten very old" by the end of the episode, although "it was funny for the first ten or so times" and "the homage paid to Cheers was well appreciated".
Krause said the animated effects used for the women with 'crazy eyes' was "rather stupid", but that the story came to a "great conclusion" as Lily crying was "one of the best emotional moments this show has ever given us".