Brash equates to irreverent though, and given Feynman is a brilliant teacher first and foremost, you'd do well to shut up, sit down and learn something from him

Brash equates to irreverent though, and given Feynman is a brilliant teacher first and foremost, you'd do well to shut up, sit down and learn something from him. <--That's irreverent. :) Honestly though, I don't see him being dismissive or scornful. In fact, I see him rise to the occasion to teach something well beyond what was asked of him. You can't beat that.