Wow, the more I look at this one the more there is to see. Although there was no way of planning it other than by being there, the way that the shot of mud on the left is framing the woman's face was a nice piece of serendipity, as is the line of her arm leading up to the other woman's face on the right. What was in your control was the choice of exposure time and AV both of which were spot on, with the mud being frozen in mid spray. As the previous commenter said, great shot!