^ When many of you enter law school (or have participated in debates in class discussion during undergrad (which I also did, though I am also currently in law school)), you will realize that it is often much more beneficial, from a practical and tautological standpoint, to allow your opponent the last word..
The above is true, with that being said, simply due to the quite obvious fact that if you have directed the oral argument in the proper manner, leaving them with the last word when they have made a noticeable blunder is truly more beneficial, practically speaking.