The concept of "now", a distant observers now, my now etc. I get. But the demo I saw framed all of this as though all of space/time exists in my conception now. From Big Bang to Big Crunch (or whatever your persuasion) and to see any part of it, I need only change my observing conditions.
Perhaps I am red-shifted, but I just saw a video demonstrating space/time as a loaf of bread and depending on how it is "sliced" an observer would see different times across space. I am having a hard time wrapping my head around this theory. I can see how an observer from afar would see my past...