Not quite sure how I feel about Rian Johnson’s “Looper.”

Time travel in movies, like great power, must be used responsibly.  In most films that is often not the case, since they tend to bend or break rules they have already established as soon as the plot finds them inconvenient.

That being said, I am not a scientist, so unless a films does something blatantly obvious in the name of story, I don’t tend to pick up on it.

Of the many films that deal the concept, here are a few of my favorites, in no particular order: “The Terminator,” “Time After Time,” “Time Crimes, “Planet Of The Apes (the original), “Conquest Of The Planet Of The Apes,” “Time Cop (though I am somewhat bothered by the fact that characters would time travel in a vehicle, yet not be in it when they emerged) and “Hot Tub Time Machine” (for the audacity of taking a remarkably stupid idea, and running with it).

A time travel film that I didn’t enjoy was “Primer,” mainly because it seemed to get so hung up on the science that it forgot that its primary job should have been to entertain.

Another thing is that I am not sure how Joseph Gordon-Levitt ‘grows up’ to be Bruce Willis because I suspect that it will take more than a bit of hard living and Demi Moore to make that happen.