Ask the bank teller if he is, in fact, Justin Timberlake.

"Hey," you say, "Are you Justin Timberlake?"

  "Yes, I am," says the bank teller.  "Now off to the lions with you."

  "You wouldn’t happen to be the same Justin Timberlake that cursed the earth with the aural torture titled "Cry Me a River", would you?"

  "The same," he says, "Now if you please, the lions are getting hungry."  With that he tries to push you into a pit full of starved lions, but you evade his weak, pop-singer push at the last minute!

  "You sir," you say to Justin Timberlake, "are a plague upon the earth.  Now prepare to cry me a river as I beat you savagely with this chair."

  "Wait!" Justin attempts to cry out, but by that point you’ve already started your savage beating process.  Being the crule, depraved shell of a human that you are, you hit him untill he actually does cry you a river, or at least a rather larger stream.

  Once you are finished beating the poor singer half to death, you realize that the angry bank patrons have gotten up off the floor and created a tight circle around you.  One of them steps forwards and says, "Do you realize what you have just done?"

  "Sure" you say, "I beat up a popular singer because I don't like his music."

  "No," says the bank patron, "You just beat up the only teller.  The teller that we all waited in line for hours to see.  The teller that was going to carry out our bank transactions."

  "Oh… Sorry?"  You never quite considered the implications of Justin Timberlake being the bank teller while you beat him up.

  "GET HIM!" the angry bank patron screams.  With that, the angry bank patrons rush you from all sides, screaming for your blood.  Even with your incredible fighting skills, you don’t even come close to surviving.  Poor you.

  You respawn inside of a mediaeval castle, specifically in the treasury room where they keep all the gold.  What Luck!

Unconfirmed