I'd like to share an experience I once had.
I was at a Sunday meet in July, and while I was talking to an MCer about my voice and diction class, and I told them that the reading I was assigned to recite was "The Jabberwocky" from Alice In Wonderland. While I was talking, a Photopass CM came up and he started to recite it. It was amazing because he knew the WHOLE thing! Even though he didn't really say all of it, to me that was completely unexpected! It made my day.
What unexpected surprises did you ever get from a regular CM?