The memory of this just popped back into my mind.
I was at a 3 day congress, and the ending prayer was said by this really old brother. He was one of the survivors of WO II concentration camps were he was put for being a JW.
Anyway, the poor man started his prayer with thanking Jah, and then he recalled EVERY piece and play of the three day congress. I bet the man had written his prayer on paper and rehersed it each day adding a new 15 minutes to it ... He even mentioned a part where a witness lady replayed an incident on the street - she gave witness to by-standers - and one of the people she talked to had a stuffed dog. I remember this cuz the brother said "and thank you Yah for giving us the enjoyment of the piece with the little dog".
Halfway through the prayer I opened my eyes and peeked around me to see if every one was having trouble concentrating ... and sure enough, lots of people were shifting and opening / closing eyes etc.
How about you, ever had such a thing happening ?