This reminds me of an old scam I often heard about during my time in New Orleans.
A young man would approach you in the French Quarter (stop it...it's not going there...get your mind out of the gutter) and say "I bet you $5 I know where you got your shoes."
You, believing there's no way in the world this guy could tell you the name of the store, take the bet.
Gleefully, the guys responds, "You got your shoes right there on your feet on Bourbon Street, in New Orleans, Louisiana. Now pay up!"
And then you, feeling your were scammed, would refuse to pay. The guy would hound you, demanding his money, his friends would come out of the nearest shotgun house, with a shotgun, and you would run for your life down St. Peters.
Or at least that's the way it was told to me.