Revealing mistake: When the airplane is coming in for a landing, we see an exterior shot of the plane shaking violently well before it has touched down. Clearly the "earthquake" effect is achieved by merely shaking the camera.
Continuity mistake: In the office tower after the quake there is a panic and workers rush down the stairs only to find them fallen away. After two women fall to their death a man is left hanging on a girder, but falls onto a giant piece of glass. Look at the top of the frame and you will see the airbag shooting our from under it.
Continuity mistake: After the drunk faints, there's a wide shot of the dam. The number of people next to the railing differs between wide and close shots. Also the motorbike guy comes off the loop and crash lands, leaving the front wheel buckled, then he tries again and you see that the wheel is straight.
Question: Each time this movie is shown on in Brisbane Australia an important scene is not shown. The deletion is of the airplane landing at the airport and then trying to get air-borne again before the runway is destroyed. Why is this removed?
Answer: There are two versions of the film. A 'film' version which does not include this scene (and others) and a 'TV Miniseries' version. The miniseries version was made to run over two nights and extra scenes were shot to extend the running time.
Question: What was the point of the crazy soldier who shoots the black thieves and later gets shot dead by George Kennedy? Why was he so nutty, and quite frankly what purpose did he even serve in the film?
Answer: Before he put the uniform on, he was a complete nobody, having the respect of no-one. Now that he's in uniform, he demands that people should respect him, and coupled with the powers of Martial Law (where looters can be shot on sight), takes the lack of respect too far and shoots them.