Junior year of college, Lily did a semester abroad, in Paris. Lily says she hadn't seen Marshall for two months. Marshall: "Two months. And I had just started having sex. I wasn't ready to stop for two months." Marshall went to visit over Spring break, and at the last minute Ted decided to join him, and brought Karen, Duchess of Douchay (Laura Prepon) along with him. We flashback to the plane, where Karen and Ted are acting all schmoopy -- at least until Karen tells him she just slept with her Philosophy professor the night before. They spend the trans-Atlantic flight fighting, making out, and crying. Finally, poor Marshall has to sit between them. We cut to the...

Airport: Perky demi-Goth Lilypad is waiting with her "Bienvenue, Marshmallow," sign and a giddy smile. Before Marshall can take her in his arms, Karen inserts herself between the two young lovers. "Ted broke up with me. I need to sleep in your room this week. Marshall can bunk with Ted." Lily and Marshall look at each other sadly, and once Karen leads Lily away, Marshall glares at Ted.

DOWISETREPLA: All these years later, Marshall still hasn't gotten over it. "Two months. My balls were bleu. Bleu! Lily says that the rest of the trip was terrible, too. We see unhappy photos of the proto-gang in front of the Arc de Triomphe; outside the Louvre; at a sidewalk café (Karen's actually smiling in that one, as is one other subject -- the waiter, François, who is flirting with her); and in front of Notre Dame Cathedral. Lily tells Robin that all she wanted was a romantic kiss picture in front of the Eiffel Tower. And she got it all right. In the shot, Ted, Lily and Marshall look miserable, but Karen and François are lost in their lip lock.

As Robin commiserates with Lily, she very obviously "drops" her phone on the floor at Barney's feet and asks him to pick it up. When he bends down, she says, "Smile, you son of a bitch! Got it." Barney stands. "Did you, though?" Robin reviews the photo. In it, Barney is still at his James Bond best. Robin says, "How'd you do that? You weren't even standing up?" Barney says, "The camera loves me, Robin. More than loves me -- the camera lusts after me." Oh boy, is that a telling (if expected) look into Barney's psyche. "The camera wants to put on some nice lingerie, pop in an Al Green CD, dim the lights and do all the work, while I just lie there with my eyes closed." He winks at her and clicks his tongue.