I've mentioned previously about how I like to take pictures of guests who are busy taking their own pictures, and here's an extreme example.
This was during the cake cutting, and I did a few pictures of the couple cutting the cake and then turned around to be confronted with a wall of people taking their own photos. I honestly have never seen this many people get up to photograph the cake cutting! This isn't even all of them - there were more on the right hand side of the frame that I left out of the picture.