My favorite illustration of Libet's work is the behavior of a top tennis player returning serve. If you ever get a chance to sit close when a guy like Nadal or Federer is playing, I recommend observing this feature as closely as possible. There is literally no time to react to where the ball is going. There are some back envelope calculations (by Libet and many others) that the reaction time is shorter than conscious thought processing time, but my opinion is the pro returning serve can sense from his own behavioral synchronization with the server the direction the serve will be going before the server's racquet strikes the ball.