One that comes to mind for me was related as an experience at last years (or the year before) DC. I think it may have been the public talk.
The experience was of a brother just released from a concentration camp near the end of WWII. He runs into a fleeing German official. The German says something like: 'So what now, since the Nazi empire is collapsing? (Said as if JWs thought that would not happen.) The JW responds that they always knew that Germany would lose the war. At this point the speaker (no doubt sticking closely with his manuscript or outline) points out how the "faithful slave" was on top of things all the time - that is, they knew Germany would lose the war.
The real history follows: In the late thirties, JF Rutherford gave a talk at Albert Hall in London (?) called "Face the Facts." In the talk he urges US and Great Britian not to oppose the Nazis since a Nazi victory was Scripturally certain. This would be followed immediately by God's Kingdom bringing Armageddon. The allied leaders would be better off trusting in God's Kingdom. This talk was then published as a booklet called "Face The Facts" for the next several years.
After that, around 1940, the Society published another booklet called "The End of the Axis Powers." (?) In it, it was said that the Axis and Allied powers would fight to a draw, then God's Kingdom would wipe out both powers at Armageddon.
Then in September 1942 came the "Peace - Can It Last." There it was predicted that the Allied powers would win, soon followed by Armageddon.
So, it didn't matter how the war ended. The Society -with their usual great insight - had predicted it!
As an aside, the actual conversation between the Nazi and the JW may be accurate. The JW may have been in a camp and only heard the most recent WT rantings. Whereas, the German may have heard the "Face the Facts" material but then got too busy with the war to keep up with the Society's latest.
As an additionsl aside, the Society's predictions actually followed after major turning points in the war. "Face the Facts came out while Germany was subdueing continental Europe, but before the Battle of Britain. "The End of the Axis Powers" came out after the Battle of Britain was lost by Germany, thus blunting their westward movement. "Peace - Can It Last" came out after the German push into Russia had been stopped and after Japan lost two major sea battles in the Pacific.
One thing I learned from this experience is that the Society does read the newspapers.