Tired of being "hustled" by "sharpies" down at the "pool" hall? Now you can turn the tables (get it?) on those ne'er-do-wells with this old-timey contraption. Just tell them you'll only gamble for money if they play by your rules - then, having practiced this in secret, you can take them to the dry cleaners, as the saying goes (I think).
Watch the video to see how it works.