One of the most memorable experiences of my post-doc was working with the venerable Joachim Cuntz. It was often amusing to attend talks with him as he'd usually

One of the most memorable experiences of my post-doc was working with the venerable Joachim Cuntz. It was often amusing to attend talks with him as he'd usually blast the speaker with a barrage of seemingly rudimentary questions. This trait is shared among almost all of the mathematicians I've respected deeply and it's always astounding how the most trivial lines of questioning can lead to deep, profound realizations.