u/ron_m_joe

In the flashforward scene, Lily walks in on Barney and Ted and tells Ted that the bride(Robin) needs him, who we know is having second thoughts about Barney. Lily then proceeds to tells Barney, "Are you sure about that tie?", which we know has acted as a metaphor for Robin throughout the episode, after which he panics and removes the tie. Was this simply a one-off joke or subtle foreshadowing that Barney and Robin wouldn't last? The timing of Lily coming in to say the bride needs Ted with telling Barney about the tie seems intentional.