I have seen some one fail a bet But his bet was high, most of the first belts are the ones where you are most likely to Pass so i would of thought that when you get up to the higher belts they make it so you have to make your ?????? To complele perfection as i was doing lower bets i flinched and had a few wrong prosisions but still passed but if you had dont some thing like that on a BLACK belt you would never pass.