The concept of time travel is perhaps the most complicated topic to center a story around, and one 2012 movie starring Bruce Willis took a novel approach. However, several iconic Hollywood movies have attempted to, which usually leads to characters in the film explaining how time travel in their respective story works. It is very easy for these explanations to confuse the audience, so Willis’ film tried something new. Instead of trying to explain the rules of time travel in the film, Bruce Willis’ character in Looper claimed that he doesn’t want to waste time talking about it.

https://screenrant.com/looper-bruce-willis-character-time-travel-rules-explanation-tropes/