[Robin walks into the apartment and sees that Ted has put back all the gifts from his ex-girlfriends]
Ted: I didn't know you were getting rid of the dogs!
Robin: You said you threw all that stuff away!
Future Ted: [v.o.] Kids, this was the worst fight Robin and I ever had. It was one of those fights that last for hours and you start to get woozy and lose track of what you're fighting about. We fought for so long, seasons changed outside the window. Pages of the calendar blew off. It was crazy. But, ultimately, and I couldn't tell you how for the life of me, but somehow we got to here.
Robin: We're really doing this?
Ted: Yeah.
[later, at MacLaren's:]
Ted and Robin: We're moving in together!