Nathan followed the other Dauntless initiates to the train tracks, a gentle hum hinting the train's coming towards them. A girl, another initiate, bumped into him and sent him tumbling fowards, only to be saved by that same girl. The old, shyer and nicer Nathan would have just told her it was ok, and spewed some statistic about how unlikely it would have been that he would get hit, but he was dauntless now
"I wouldn't need to be careful if you hadn't bumped into me"
Nathan said sharply, glaring at her