Let's say that you leave Earth at 75% the speed of light (c). You travel out and back for a minute. And when you come back an hour has passed on Earth. (I understand this is not accurate; I'm just using it for the sake of this hypothetical) You leave again at 99% of c, again for a minute. When you get back to Earth, a day has passed. You do it again at 99.99999% of c. You come back to Earth and 10 years has passed. Again at 99.99999999999% and 10,000 years has passed. You can keep adding 9 onto the end of that percentage, and the one minute you travel will be more and more time for those left behind. Isn't it true, then, if you are actually able to hit the speed of light, that means upon "returning" you've completely bypassed time itself? Shouldn't an infinite amount of time have passed? Since you can "bypass" (can't think of a better word) any measurable amount of time by getting closer and closer to c, wouldn't it make sense that to actually hit c would be to "bypass" an immeasurable amount of time?