Barney: The truth is, I'm afraid the three-way story didn't go exactly as I said it did.
[flashback to Barney chatting with Sarah and Lisa:]
Barney: Nailed it. Who's up for a three-way?
[The two ladies throw their drinks at him.]
Barney: Lisa, wait.
Lisa: Yes, Neil?
Barney: Oh, you're Lisa? Sarah, wait. Look, I'm not Neil Armstrong. I'm sorry I lied.
Sarah: Well, I guess I wasn't completely honest with you either. I mean, I said that I was 28, but the truth is that I'm really 31. And if we're being completely honest, I went to the doctor the other day and found out...
[present:]
Barney: Thirty-one! I was happy, very happy, thinking that I had nailed a 28-year-old with some sun damage. People want the lie, Marshall. They need the lie, which is why, as far as I'm concerned, you were mugged by a monkey. Just as sure as I had that three-way. I am the greatest in the world!