Original sentence: ' in an almost inaudible voice.... A hurried glance behind revealed nothing wrong, but I decided to shut off the power and descend as soon as the machine could be faced in a direction where a landing could be made.... The machine suddenly turned to the right and I immediately shut off the power.But when the machine turned head first for the ground, he exclaimed 'Oh.It was on the very first slow turn that the trouble began.On the fourth round, everything seemingly working much better and smoother than any former flight, I started on a larger circuit with less abrupt turns.Our course for 50 feet (15 m) was within a very few degrees of the perpendicular.Quick as a flash, the machine turned down in front and started straight for the ground.Selfridge up to this time had not uttered a word, though he took a hasty glance behind when the propeller broke and turned once or twice to look into my face, evidently to see what I thought of the situation.This decision was hardly reached, in fact I suppose it was not over two or three seconds from the time the first taps were heard, until two big thumps, which gave the machine a terrible shaking, showed that something had broken