Severus surveyed the scene looking for what could be the cause of Hermione's fright. No one was around her; nothing was surrounding her but trees. There was no threat.
"It's only a nightmare."
"Oh my God," Severus gasped.
He franticly looked around once again. He saw it. The nightmare. The prisoner in her nightmare was being held in this clearing by the Death Eater. Being killed. This is the exact spot where Hermione had watched her loved ones die over and over again while she was sleeping.
iI don't care if it's only a boggart/i Severus realized, iShe's genuinely scared./i