 where the only thing is in or out. Was the ball in? Was the ball out? Person against person playing the match. Was it in? Did it touch the line or not? When you're talking about was it off sides? Was it a handball? Is it a ball? Is it a strike? Is he safe? Is he out? Is it a first down? Is it not a first down? All of that gets convoluted. Tennis' technology is amazing. There's drama to it. It's the best, but it's not for everyone. It works in tennis. I don't know if it works everywhere else.