Ted: Okay, that is definitely not what's going on with me and Tiffany. Listen to this.
[flashback to Ted and Tiffany talking:]
Tiffany: I'm really into you. I just can't be with you right now.
[present:]
Ted: Eh? Eh?
Robin: Ted, "right now" is the classic on-the-hook catchphrase.
Marshall: Yep. "Right now" paints a picture of some sort of magical future time when everything will work out. But the truth is that will never happen.
Barney: It's like this, "I can't be with you." Boom! "Right now." [imitates door creaking open]