how do you stop it from happening again? >> it might be a while until we find out the answers as ntsb investigators try to figure this out. >> one of the passengers who was on this flight, that crashed in san francisco said the scene was just chaotic. now, he is okay and so are his friends, so are his relatives but we want you to listen as he describes the moment that plane came down. >> were like ten second as way from being home and seemed like we were a little bit high and like we could see the tarmac down below us so we're coming down kind of sharp and then right when it started to coast like for the landing all of a sudden the engine was off like you sped up like the pilot knew he was short and then just, boom, the back end just hit and flies up in the air and everybody's head goes up to the ceiling and then just kind of rests for a bit, about 300 jars and tips over, fire starts. everybody is pushing the doors