TSA Agent: Open the box now!
Barney: I can't. Magician's Code.
Quinn: What the hell is the Magician's Code?!
Barney: "A magician never reveals his tricks." Mr. Flanagan, my magic mentor from the hallowed Staten Island Mall Magic Shop, taught me the importance of the Code one fateful autumn night in 1993.
Quinn: Always good to tell a long story while people are aiming guns at you.
Barney: 'twas a night that changed my life.
[flashback to goth Barney in 1993:]
Barney: Hello? Mr. Flanagan. Wh-What are you doing here?
Mr. Flanagan: Um, I'm checking up on you. Just to make sure you're practicing your craft or whatever.
Barney: That is an honor, sir. And yeah, I promise, I'm practicing. But wait. Why were you... Why were you going in my mom's room?
Mr. Flanagan: Uh, your mom's actually helping me with a new trick.
Barney: That is so cool! What is this trick? Is it sawing a lady in half?
Mr. Flanagan: Well, not sawing. But actually, the Magician's Code forbids me from telling you anything else about the trick.
Loretta: [o.s.] Wayne, come back to bed!
Mr. Flanagan: Okay, it involves a bed.
Barney: W-W-Wait. Can you at least tell me the name of this trick?
Mr. Flanagan: Sure, kid. It's called...
[present:]
Barney: The Disappearing Salami. Mr. Flanagan's wife shot him before he could ever tell me what the trick was.
Quinn: Yeah, that guy was banging your mom.
All: Yup.
Barney: Mr. Flanagan was not ban- Oh, my God, he was.