Although in the library, facing the 'intimidation' from his two companions, Zheng Qing could remain calm, witty, and self-assured, but when he was alone in private, he couldn't help but worry.
The good news is, this wasn't the first time he faced a death threat since entering the Wizard World. He could use his rich experience to greet the upcoming challenges, and with Su Shijun by his side, he didn't really need to worry about anyone being foolish enough to directly hit him over the head at the ball.
According to Xiao Xiao's words, 'the worst situation has already happened... things can't get any worse'.
What the Doctor referred to was probably that period just after the article in the "Daily Horn Newspaper" was released—frenzied Roaring Letters, Nightmare Dolls losing their heads in rows, the Halloween bonfire parade, and the smacking in the dead of night, among others—perhaps in Xiao Xiao's view, that was the worst case.
