Self-tying shoes Self-tying shoes Self-tying shoes (also known as "self-lacing" or "power laces") are designed to automatically tighten once the user puts them on. Such shoes were initially depicted in the 1989 science fiction film "Back to the Future II". In April 2009, Nike filed a patent for self-lacing shoes, with a design that bears a resemblance to those worn by Marty in the film "Back to the Future II", raising speculation among fans about a possible debut of self-lacing shoes. In 2014, Tinker Hatfield, the designer of the original Nike shoes as depicted in "Back to the Future II", indicated that
Time travel in fiction a time war: In Western fiction, one common use of time travel technology is to travel back in time and attempt to kill Adolf Hitler in an attempt to avoid World War II and the Holocaust. Fiction that applies the Novikov self-consistency principle that the past can't be changed results in plots where attempts to assassinate Hitler or avert the war are destined to fail, or where they actually result in the rise of Hitler as history records it. Fiction that does allow the past to be changed often explores the unintended consequences of time travel or the butterfly effect,