Future Ted explains that Robin's Canadian quirks and mannerisms were strange, which got her into trouble in the fall of 2009.
Barney encourages her to take the citizenship test and teaches her to be obnoxious, arrogant and willfully ignorant—the hallmarks of a true American.
After some serious drinking with Canada's national women's curling team, she blacks out and ends up in a Toronto hotel room.
After some free Canadian health care, they return home and Robin decides she wants dual citizenship.
They drive back to the bed and breakfast not speaking to each other, but the audio-book story they are listening to makes them realize they need each other's friendship, and they reconcile.