I'm a little confused on the baseball example. I know just about nothing about relativity, but doesn't light always move at the same velocity relative to you no matter what speed you're going? So if you're going .99999C, wouldn't light still appear to you to be going 300,000 KM/S relative to you? Then how would a baseball reach that speed if you through it at 90 MPH? God, I understand nothing about this. Could anyone point me to a site that explains this stuff that I might be able to comprehend?