Recklessness was taking action without properly thinking it through. When one calmed down afterward, one would realize how foolish one had been, but in the moment, there was no time to calm down to think about the choices; the action was made according to one's instinct.
Ye Shuang had always believed that Han Chu was not a reckless person, but what had happened that day renewed her understanding of the man.
Why would he jump down from the hiding place? Was it because he thought that having threats coming from different directions might fluster her or because even if he thought that she had a high success rate, he could not ignore the very minute possibility that she might fail?