A disturbing scene unfolded on a United flight from Chicago to Louisville on Sunday when cops forcibly dragged a doctor off the plane after he refused to give up his seat on the overbooked aircraft. "Not a good way to treat a doctor trying to get to work," passenger Tyler Bridges tweeted along with video of the incident. "Kids were crying." Another tweeted, "United overbooked and wanted four of us to volunteer to give up our seats for personnel that needed to be at work the next day. No one volunteered, so United decided to choose for us. They chose an Asian doctor and his wife. The doctor needed to work at the hospital the next day, so he refused to 'volunteer.' United decided to use force on the doctor...The doctor's face was slammed against an armrest, causing serious bleeding from his mouth." In a statement, United CEO Oscar Munoz apologized for the incident, saying, ""This is an upsetting event to all of us here at United. I apologize for having to re-accommodate these customers. Our team is moving with a sense of urgency to work with the authorities and conduct our own detailed review of what happened. We are also reaching out to this passenger to talk directly to him and further address and resolve this situation. This is NOT GOOD for what appears to be an already struggling airline. Just WOW. One more point for Southwest!