"Oddly, it was as if being on the verge of escape was the time when they were the most frightened ... as if turning over their safety to us had taken away their own control, and it petrified them," Harry continued. Then his expression clouded darkly again. "Though I later learned that their fear ... which was very real and very genuine as it was ... had actually been heightened by some very obscure magic that I wasn’t familiar with at the time.