Nero looked from the scribbles to the examiner, and found that the examiner was staring at him. Nero simply nodded, and moved to exit the room.
Looking at the scribbles, Nero did not think he was being messed with. Instead, it was clear to him that the scribbles were yet another part of the test to see his mentality and personality. Such an abrupt and unexpected surprise would easily make one break character and reveal their true expressions or thoughts, if only for a split second.
For Nero, this was hardly a test at all for he was not acting - instead he was genuinely keeping his cool. However, the sight of the scribbles cemented the idea that his exam was being secretly viewed or monitored from somewhere and that his answers were recorded in full.
Once Nero left the room, the examiner turned to look at the wall behind him, and disabled an illusion, revealing two other examiners, both of them recording and commenting on Nero's answers.
