It means you see nothing interesting then a shockwave and here they are.

And here they were, because FTL travel implies eliminating the distinction between "before" and "after."

Not really: https://www.youtube.com/watch?v=9-jIplX6Wjw&pp=ygUKc2FiaW5lI...

Admittedly, I'm in the awkward position of being an old industrial physicist, so on the one hand I'd need an explanation with a bit more substance, but on the other, it would probably be over my head. The most I was able to get from the video is that maybe quantum gravity will crack the problem.