This is a easy-seeing mistake, and very interesting:
1- Skip the video tape to the part of the tyranosaurus attack.
2- In one scene, the man who's in the children's jeep goes out and leaves the door opened.
3- In the next scene, into the jeep of Allan Grant and Ian Malcom, if you look at the glass you'll notice that the door is closed!!!
4- In the next scenes, the door is closed again.
If you have any comments, please mail me. Teknad.