Can spacetime slow down dramatically? My head is going to explode thinking about this...

First of all I love documentaries about our Universe. I recently watched one about how the scientists predict how the Universe would and when it supposed to end. The how and when it ends doesn’t really concern me, they predict it supposed to end in about 100 trillion years. They did though go through the 5 different stages of the Universe..The Primordial Era, The Stelliferous Era (which is the one we are in now), The Degenerate Era, The Black Hole Era, and then finally the era that really boggles my mind…The Dark Era.

What boggles me about this era is they predicted in this era time will almost be non existent something like 0.0000000000000001 before time reaches 0. So they said if a human were to live in this stage of the Universe, the mere thought of doing something like tying your shoe for example would take you 1 trillion years just to come up with the thought of it. How could this be so? In this era matter no longer exists well at least what we consider matter and because matter does not exists and hardly does time, they say anything that exists in this era is very very slow. Also in this era it is possible that atoms which to us right now are microscopic could theoretically grow as large as the Universe itself. In this era does it seem like our laws of physics just change radically and nothing makes sense anymore? Any physics people out there that want to chime in on this head exploding subject?