The String of Pearls w/ Direct link technology (A Mystery Thriller )

He had a short disagreeable kind of unmirthful laugh, which came in at all sorts of odd times when nobody else saw anything to laugh at at all, and which sometimes made people start again, especially when they were being shaved, and Sweeney Todd would stop short in that operation to indulge in one those cacchinatory effusions. It was evident that the remembrance of some very strange and out-of-the-way joke must occasionally flit across him, and then he gave his hyena-like laugh, but it was so short, so sudden, striking upon the ear for a moment, and then gone, that people have been known to look up to the ceiling, and on the floor, and all round them, to know from whence it had come, scarcely supposing it possible that it proceeded from mortal lips.