Perhaps on the verge of taking civil litigation to a new extreme, Dallas Mavericks owner Mark Cuban appears to be contemplating some sort of legal action against Golden State coach Don Nelson. And some view it as payback for Nelson's Warriors upsetting the Mavs in the NBA playoffs.

Of course, the feud between Cuban and Nelson predates the recent playoffs. Nelson once worked for Cuban and the basis for the owner's action, whatever it turns out to be, is an argument that Nelson used confidential information about Dallas to engineer the first-round upset.

I can see the eyeballs rolling skyward out there now.

Look, forget about what's rational here. Cuban is a guy who has just enough imagination to dream up this stuff and certainly more than enough money to fool around seeing if he can make some kind of point. 

Nelson said this is actually tied to him trying to recover money he contends the Mavericks still owe him.