As I recall, it was Feynman giving a presentation in a biology class he was taking, and the biology graduate students saying Yeah, Yeah we know that; Feynman th

As I recall, it was Feynman giving a presentation in a biology class he was taking, and the biology graduate students saying Yeah, Yeah we know that; Feynman then said that no wonder he could catch up to graduate level if they spent all that time memorizing cat anatomy. And I'm not sure that Feynman had quite the name outside the physics community at that point.