Switching gears now, another air flight -- Another one. A scary scene in the skies. Severe turbulence striking a cathay pacific flight from San Francisco to Hong Kong launching passengers from their... See More
Switching gears now, another air flight -- Another one. A scary scene in the skies. Severe turbulence striking a cathay pacific flight from San Francisco to Hong Kong launching passengers from their seats. ABC's John muller is here and has the latest. Good morning, John. Good morning, robin. It's the second frightening incident this week. Nine people injured on this flight. The turbulence so violent passengers thrown around like rag dolls some hitting the overhead bins. One called it pandemonium. It was a routine flight from San Francisco to Hong Kong on board this 747 carrying 321 passengers. Suddenly chaos struck. Suddenly there was a massive jolt. It was like the plane was almost dropping sideways. Reporter: The cathay pacific flight was passing over Japan when violent turbulence hit so severe some hit the ceiling. Others were thrown out of their seats leaving two crew members and six passengers hospitalized. You can see in these pictures debris scattered everywhere. Passenger Vincent sunder spoke to "Gma" after he got off the horrifying flight. For a couple of minutes we didn't quite understand what was going on. The only thought was, this aircraft is going down. Reporter: Every year turbulence injures an average of 32 people on planes more than two-thirds of those are flight crew. Earlier this week a united plane from Denver to Billings, Montana, hit severe turbulence with one crew member still in serious condition. Felt like something came up from the bottom and hit the bottom of the plane. And then stuff and people were flying all over the place. Reporter: That plane has been taken out of service until the airline can figure out what happened. When you're up at high altitude and there is thunderstorm activity you always got to watch out for these billowing updrafts and if you're in clouds it's hard to see them and sometimes it's very hard to make them out on radar, as well. Now, the ntsb is collecting information on both these incidents to see if a broader investigation is necessary. This week, two grim reminders that it's always best to keep your seat belt buckled at all times.
This transcript has been automatically generated and may not be 100% accurate.