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 time travel works explore the topic of disrupting causality leading to time paradoxes. One of the most commonly referred to in time travel literature is known as the grandfather paradox. Many works of fiction explore what would happen if a time traveller went back in time and changed the past, for example if they killed their own grandparents. A time slip is a plot device used in fantasy and science fiction in which a person, or group of people, seem to travel through time by unknown means for a period of time. The idea of a time slip has been