People that...
They ask you a question as they expect you to be more knowledgeable in the topic.
You answer. It's not the answer they were expecting, or they don't like it. They get half-pissed. So they make you a slightly different question, so you should be forced to give them the answer they want.
You say: "I do not know anything about that" and they get pissed cause you are not collaborating.
It's FULL of them, isn't it?