Miami ? Some passengers were snoozing while others snacked when the first turbulence rattled Continental Flight 128 over the Atlantic. Suddenly, the jetliner began to plunge and shake violently, hurling passengers over seatbacks and slamming them against luggage bins.

The Boeing 767 made an emergency landing in Miami early Monday so at least 26 injured, four seriously, could receive medical help. But the sudden turbulence that rocked the overnight flight from Rio de Janeiro to Houston was an all-too-real reminder of an Air France flight — also traveling from Rio — that crashed into the mid-Atlantic in June during thunderstorms, killing all 228 people on board.