Quote from Ted in Robin 101
Lily: Oh, here's a good one. "Top Five Things Never to Do Around Robin." [flashback to Ted's classroom:] Ted: Three: "Never, ever play the 'Guess Who' game with her." Barney: What do you mean? [flashback to spring 2006 as Ted walks up behind Robin on the street and puts his hands over her eyes] Ted: Guess who? [Robin pulls Ted's arm and flips him over on to the ground before standing on his chest.] Ted: It's me! It's me! It's me!