[R]ewinding any given moment and still be able
to remember what never happened after all. No bullshit 'pause' or
'fast-forward' or any of those other options. Until the last moment of
your living conscious being intact, you could undo and do retakes. E.g.
punch someone in the middle of a conversation to see how they would
react, but not have to deal with the consequences; jump off a cliff
and you could still undo the (attempted) suicide as long as you do it
before you hit the ground. Miscalculate by a fraction of a second, and
you cannot go back.
Also, no 'reliving memories' -- except to the
extent that your fallible human memory can re-create the moments
you've already lived through. 'What you remember becomes what happened'
quite literally.
[W]henever you decide
to 'revisit a memory' it will change the course of events to an
unpredictable degree, because of the incredible number of variables and
you will never be the same person stepping in the same river.
