Mounted Shooting Drill: Mirror Image

Greetings fellow Mounted Shooters!  I wanted to put out a little drill to help those of you that may have some experience under your belt.  This drill is great and can be used with several different courses. It works best with courses that have the random course on one side of the rundown or the other.  Fell free to be creative with how you use this drill.  And please let me know how it goes or maybe what course you like to use it with the best.  Enjoy!