One of the biggest advantages to having a second photographer for weddings is this shot. The bride is the star of the show, everyone knows that but while everyone is looking at her many don't get to see the grooms reaction of the scene. I tell my second photographers that at the beginning of the ceremony their ONE JOB is to get the grooms reaction. There is no faking it, or do-overs when the groom sees his love for the first time coming down the aisle. Granted more times than not the groom gives a simple smile or maybe mouths a "wow" to his best man, then there are the times where all the emotion comes out and a wonderful moment is captured. Brides have told me many times that these are some of their favorite images.