What is the cutest and most unexpected thing you have encountered at a wedding? please share yours.?

my niece was married in may. she is a very intelligent girl, 4.0 average thro college, sweet, kind, quiet. not one that ever throws you such an "unexpected". but they played "all shook up" by elvis while "walking" (more like bopping) back down the isle together after the ceremony. no she's not really what you would call an elvis fan but it went over great!!!! it was so unexpected after such a trdional service, everybody smiled and laughed as they ped by. it was kinda like an instant celebration after "i do." the reception was just food and visiting......no music or band.. part of what was so great is she had told only 2 or 3 people and the family or entire wedding party did not know either!!