It is the coat on coat off scene. 56 minutes into the movie Dre meets Mr. Han at his place to start learning kung fu. Dre drops his jacket on the ground to the very right of the door. The next time you see the jacket on the ground about 30 seconds later in the movie, it has moved to the left hand side of the door. The next scene you see it behind Dre back on the right hand side. The next time after that the coat is located just to the right of the middle of the doorway. This is a big door too. You see Mr. Hans car on the other side of it in his living room. Immediately after that it is back at the right of the door. Immediately after that is right smack in the middle of the doorway. When Dre finally goes to pick up his jacket it is right back where it started at the far right of the doorway.