How I Met Your Mother, Season 7

[At the JFK passenger terminal, Barney and Quinn are asked about the luggage]

Barney:
It's mine. Did you have to replace the luggage too?

Quinn:
By the time we land again you'll be wearing hot pink stilettos.

TSA Security Officer:
[sees box in bag] What's that?

Quinn:
Yeah, what is that?

Barney:
It's a magic box. You see, I'm something of a magician.

TSA Security Officer:
Open the box, sir.

Barney:
[laughs] Oh, I can't do that. [K9 barks]

TSA Security Officer #2:
Sir, are there drugs in that box?

Barney:
Oh no, he's probably just barking because of the explosives. [officers draw firearms]

Quinn:
Oh my God.

TSA Security Officer:
Tell us what's in the box right now!

Barney:
I can't. Magician's Code.