Watching this movie, it brought up a few questions that's been visited quite a number times: The mechanics of the theoretical ability to travel through time.
If you travel backward in time, will there only be you or will there be a "past you" that you will encounter?
If there is a past self: In certain media, it's been said that if you come in contact with your past self you two would cancel each other out and cease to exist. Do you think that would likely happen or would the other theory that nothing happens be true.
If you change the past, would the "you" that changed time be erased or would you still exist?
What other questions on the mechanics can you think of? What do you think would happen?