Wizard of Oz, The - Hourglass
Either wait or skip to the part when Judy Garland(Dorothy) is stuck in the witch's tower and the hourglass is tipped over. Notice when it changes scenes,the hour glass stays the same after two minutes. Also, on the right of the hourglass at the top all through the duration, there is a ripple in the sand. That can't stay there!
copy of the movie or DVD