The spirit of good sportsmanship shone brightly when American runner Abbey D&amp;#39;Agostino (right) and her 5,000-meter-race competitor Nikki Hamblin, of New Zealand, collided and fell to the track.&amp;nbsp;Instead of jumping up and continuing to race, D&amp;#39;Agostino stopped to help Hamblin get up. Later in the race, when the injured D&amp;#39;Agostino was struggling to run, Hamblin stopped and assisted her. 