In all, six were injured after a United flight from Houston to New York hit extreme turbulence and made an emergency landing in Lake Charles on Tuesday.  One of the flight attendants remains in serious condition at Lake Charles Memorial Hospital as of this morning, according to the American Press.

It's not unheard of, but it's also not commonplace -- apparently the 737 hit a patch of turbulence that dropped the plane suddenly.  Those who were onboard and not buckled up were thrown violently into the ceiling of the plane and then tossed back down to the floor of the plane.  The incident happened at about 22,000 feet.  Lake Charles Regional was the closest airport, and the plane made an emergency landing there at about 8:40 p.m. Tuesday night.

Three crew members were taken to the hospital when the plan landed, and three passengers were taken after the aircraft was emptied, said Heath Allen, airport executive director.

Matt Felder, hospital spokesman, said five of the six were treated for injuries and released.

...Allen said diversions happen fairly often, but not medical emergencies of this magnitude. He said this is the first time in recent history that several people have had to go to the hospital because of turbulence.

Source:  Lake Charles American Press