This man knows his stuff. That's the nice thing about physics, if you want to know what some weird thing will do, you just put in the numbers into the equation and see what wacky result happens. I still think it's not reasonable to believe that we will ever exceed the speed of light, since we can't really reach that speed without being at the speed of light during acceleration. But who knows, maybe Quantum Entanglement will show us some things we don't know, but I doubt it (I think it's more likely that that works with some kind of space folding, kinda like how an Alcubierre Drive is supposed to work). It just seems unlikely, since things going backwards through time...man no idea how that'd even look/go. But who knows, the universe is a crazy place.