Mine would have to be while playing in a USAV men's A tourney, I was hitting outside against a team who's setter was the husband of a longtime friend and coached club ball with me. I got a nice tight set against a blocker and crushed the ball at the setter who was standing within the 10' line. He was standing there with his hands up protecting his face and the ball hit his foot and popped back up into play. They ended up winning the rally.
After the match, I sat down with his wife and she said... I can't believe how lucky he got...