Late Night Thoughts (no slide, just drunk-speak)
Time/Dimension Travel:
Even if made entirely possible, it would seems a one-way door. You could go back (which you have ALREADY done BEFORE you do it (loops?)) or you could go forward (which make YOU the ONLY entity "aware" of your current condition,) therefore, at LEAST, "culturally inappropriate", at MOST, "insane", depending upon what you wish to publicly reveal about your current "condition".
This said, the REALITY of Time/Dimension Travel, nullifies itself by being a situation ONLY perceived by the Traveler.
Just saying……