Renata Effect
N. A theory describing a situation in which an individual commandeers a conversation, only to immediately make that conversation exceedingly boring.
Professor: "Let us now examine the Renata Effect. Notice how this group of five people were initially discussing the very interesting topic of the difference between a chode and a taint when one of the individuals aggressively hijacked the topic at hand, only to begin telling a mundane story about the rate at which certain traffic lights change."