Passengers were asked to take a later flight to allow a crew member to have a seat (it was a full flight). As the flight attendant began the announcement, the young male flight attendant took the microphone from her and chastised everyone for not listening. He was rude and talked disrespectfully to everyone on the plane - which didn't help the request for a volunteer to take a later flight. They got a person, but he was just rude, and they were lucky. No one wanted him to be their flight attendant after that outburst.