A precocious, but rather gauche boy's eyes were glued to the screen. In memory of his late grandfather, who had been a metalworker all his life, the boy was working on a technical drawing of a lathe on his computer. His mother was annoyed and confused by his conduct. 'It's like talking to a stonewall,' she mumbled and shut the door of the boy's room behind her.
(Screen, to stonewall, precocious, lathe, gauche)