Beware the "Yours!" of Tennis

       Jeannie and I go back many years as part of the same group playing doubles tennis on Sundays, but when I'm her partner, I laugh every time she says, "Yours!" 

       Why?  Because it appears to me she could have gotten to the ball and returned it.  When the word "Yours!" pops out of her mouth, I am typically miles away, and the ball is already by her and clearly out of human reach, certainly out of mine.

       What can I do but laugh?