http://www.ftg-comic.com/2007/10/18/index.php

There’s a reason that the universe as we know it disallows time travel for everything save very very small stuff that nobody would invite to a party anyway. What would the world do, after all, if through a time paradox TWO Guy Lombardos existed at the same moment in time? Most likely collapse in on itself through the sheer density of Awesome. Yes, the consequences pile up pretty fast… why you might even get yourself even firepower to down a tsar for a minute or two…

– Geoff and The Count