 CONT: When the Dude is at the Malibu police office, the position of  the cup of coffee of the officer changes during different shots.  When the Dude falls on his desk, he puts his cup of coffee on the  white paper on his desk. In the next shot the cup is on the edge of  the white paper. Next shot it moves a little bit towards the  officer. And then on the next shot it is again on the edge of the  white paper.