"That would be ideal," he said, a little dry - but mostly pleasantly surprised that he had managed to get through to him at all. "Better, I think we can all agree, if you don't run afoul of any of the students." There were stranger things than Nott roaming the halls, but students could be a danger, too, really. Especially for someone quite so ... odd.
Severus stayed where he was, not moving at all when Nott fell back - and watched as he tried to slide himself away along the ground. Clearly verbal communication was imperfect, and he was curious as to whether he might do better with something more direct. He suspected he could read Nott's thoughts easily enough in his current state, that the man could have no real defenses to speak of. But maybe it would be as useless as talking - if his mind was as badly disordered as it seemed to be, it might be like groping through mud. He didn't know. He had never tried to read anyone in quite this condition.
And it would certainly be improper, no matter how intriguing the prospect might be. "I'm not going to hurt you," he said, trying to suppress some of his impatience. "Why are you frightened?" He had no business being so, considering how many people were going to great lengths to keep him out of harm's way.