&quot;The professor also seemed to be going crazy...&quot;<p>Mad as a hatter?  (<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mad_as_a_hatter" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mad_as_a_hatter</a>)