I'm sure this has been on the forums before, but it's pretty funny:
THE DEATH OF ADOLF HITLER on AUGUST 13, 1908 in VIENNA, AUSTRIA
THE DEATH OF ADOLF HITLER on AUGUST 13, 1908 in VIENNA, AUSTRIA
ADOLF HITLER is KILLED by BULLET WOUND IN CROSSFIRE BETWEEN TIME-TRAVELING ANTI-NAZIS SENT BACK TO KILL HIM AND TIME-TRAVELING NAZIS SENT BACK TO PREVENT HIS ASSASSINATION
As a result: Causality loop annihilates time and space surrounding Vienna, knocking everyone in the city back to 1529 and the eve of the First Turkish Seige; as the 20th century Viennese use their historical knowledge to help the 16th Century Viennese, time-traveling pro-Viennese forces appear and fight a pitched battle with time-traveling pro-Ottoman forces, pushing everyone back to 955 and the Battle of Lechfeld; when the time-traveling pro-Magyar forces show up, they are slaughtered by everyone else which is tired of all this time-traveling crap, thereby ending the causality loop. Vienna becomes world power; Henry Jasomirgott first man on the moon, 1155