"Old Biff Vanishes" Deleted Scene on youtube, Pause between :15 and :16 seconds, read the numbers on the License plate behind biff as he gets out of the way of the last two numbers as the camera pans back to doc, Marty and Einstein. Also read the bumper sticker, I break four birds (planes) exactly what occurred on 9/11/01, but who does old biff represent? What country vanished in 1989? The soviet union. The videos on YouTube that include 9/11 in back to the future symbolism do not include the Old Biff Vanishes deleted scene, why? They are hiding that evidence in plain site because it is on the DVD extras.