1boy, man, man ,solo, black hair, black hair, middle age, old,,, best eyes, pristine quality, best quality, ultra resolution, dynamic lighting, movie lighting, action lighting, best hands, best drawn hands, hands, best face, short hair, best teeth, best drawn teeth, macro lens, best macro lens, upclose view, closeup view, young, professor, wearing dark grey shirt, in a classroom, classroom, standing in classroom,,,talking, explaining, having conversation, wise, proud, expression of pride, proud, feeling proud, happy, expression of happiness,