As the wedding approaches, Robin experiences a severe panic attack. Her anxiety centers on the missing locket, which she views as a sign that she is marrying the wrong man.
: Robin walks down the aisle to an instrumental version of "Sandcastles in the Sand," the song that first sparked her romance with Barney. [S9E22] The End of the Aisle
In a pivotal series moment, Robin attempts to flee the wedding and literally crashes into The Mother. As the wedding approaches, Robin experiences a severe
Marshall promises to stop shouting at Lily while she is "dropping a deuce". As the wedding approaches
: Instead of a grand speech, The Mother simply advises Robin to take three deep breaths. When Robin opens her eyes, Barney is there.