引述 :『Just as the deadly heel swings down, the roach will make a sudden rotation, then scurry, and that quick swivel is his vital secret. The turn will position him in one of four orientations: he’ll point himself roughly 90, 120, 150 or 180 degrees away from the wind your shoe creates. But which of the four will it be? Aye, there’s the rub. For that, it turns out, is highly unpredictable.』