Turning around, she shone her wand light in the general direction of where Professor Scabior was. Right, near the entrance...

Walking over to him quickly, she stopped when she was about a safe distance from him. "I was asking if it was the real sorting hat down here, and not a replica..." she repeated.

Now, where would a snake fang be? In a snake head, riiiight? She'd probably go there to check after he responded.