Can you spot anything wrong with this wedding photo?

Can you spot anything wrong with this wedding photo? At first glance it simply looks like an idyllic embrace between the newlyweds. The bride looks gorgeous in white and the groom looks handsome in his suit. But when you look a little closer there is something a little unusual in the background.

Has the poor bridesmaid lying face down on the floor suffered a devastating fit of nerves?
The expression on the face of another of the bridesmaids on the left as she peers down at the unfortunate woman is perhaps the best part of the image. This pic has gone viral and has been shared several times.