There was a conference at a German university for MA- and PhD-students where a big shot scientist was invited, and the students had the opportunity to present papers addressing this big shot’s work (the papers were prepared in a course preceding the conference). I presented a paper together with a male first year PhD-student (I was a 2nd year MA-student). When we finished the talk, the big shot scientist was overwhelmingly positive (he said something like that our talk alone made it worth attending this event). In the Q&A a (male) professor of the department asked a question which concerned my part of the talk (he was basically repeating the point I was making). The big shot replied but the professor was not content with the answer. So, after the session, my Co-speaker and I still standing in front of the room, this professor (obviously aroused by his discontent with the answer he got to his question) approached us to further discuss the question – but he immediately addressed only my (male) Co-speaker (whose part of the talk was irrelevant to the question) while turning his back towards me making it impossible for me to join the discussion. Apparently, this professor did not really believe that I contributed to the joint talk and that I was competent enough to discuss his question with him.