You might know about the famous novel 'the time machine' by h.g.wells and its movie too. Also other famous movie like 'back to the future'. So in all these movies there is concept of time travelling back and forth. But in h.g.wells novel its written that time machine only takes him into the distant future and when he tries to return he only dwells into the karmic rerun glimpses of his past only as if acted upon in a recording in a nut shell.
And also the time machine works on the principles of light energy, electrical energy, prism and time loop portals occuring in fourth dimension in space.
But these things theories are rarely seen in movie of michael j fox car which is ran through an electrical interphase.
What if the general idea in this time travelling concept is of 'accelerated motion' from a reference point of time to another. Such like a electrical locomotive which runs on electricity overhead wiring moves from one time frame towards another, so thereby accelerating in time movement and achieving smaller time travels if one gain in the sleeps in the fourth dimension like train unpeculiarly halting at invisible unknown stations in time frame??? Or at time travelled destinations!