On my rotation, me and other med student have to meet with the Attending weekly to get pimped. The other student is obviously very smart, but extremely annoying. The attending started by asking him to list the causes of X. He listed about 5-6 causes, and I just sat there and listened because the question wasn't directed toward me. I knew the answers, but I wasn't about to steal his thunder. Then, the attending asks me to list the causes of Y. I list 1 thing and before I can say the next things on my mind, this annoying guy interrupts and names off everything that was on the tip of my tongue. Then, I looked like a dunce because I didn't have anything else to add. THE QUESTION WAS DIRECTED TO ME!! Additionally, this guy wouldn't even let the attending finish his sentences. The attending was trying to teach, but the annoying guy would interrupt and finish every one of his sentences. The attending actually said, "You're the type of person who likes to interrupt and disrupt my train of thought, aren't you?" Is this guy making me look bad, or making himself look bad?