Lily: Ooh, I got a text from Barney. "Look under the table." Oh. It's a page from the Playbook.
Robin: What does it say?
Ted: It's "The Scuba Diver".
[title card: "The Scuba Diver"]
Barney: [v.o.] Step one: tell a meddlesome female friend about the Playbook. Step two: run a play on one of her coworkers, making her so angry she steals the play book. Step three, put on the scuba suit and tell her you're gonna do "The Scuba Diver" on the hot girl standing by the bar. Your friend, let's call her Lily, goes and talks to the girl and tells her everything about the book. Now, here's where it gets tricky. When Lily and the girl ask what "The Scuba Diver" is, take off your mask, give them spiel about your deep-seated insecurities which don't really exist, because, let's face, it you're awesome. Feeling bad for you,Lily talks you up to the girl who agrees to go get coffee with you. And it... is... on.
[Ted, Robin and Marshall are stunned into silence]
Lily: You son of a bitch.