Kurt Vonnegut's Helmet

Origin
Kurt Vonnegut, Jr. (November 11, 1922 – April 11, 2007) was an American writer. His works, such as Cat's Cradle, Slaughterhouse-Five, and Breakfast of Champions, blend satire, gallows humor, and science fiction. As a citizen, he was a lifelong supporter of the American Civil Liberties Union and a pacifist intellectual, who often was critical of the society that he lived in. He was known for his humanist beliefs and was honorary president of the American Humanist Association.

Effect
This helmet was used by Vonnegut while he was in Dresden, Germany as a prisoner of war. When worn, the user will begin to spontaneously travel through time and space to a random moment in their life, either their past or future. The helmet will always remain where the user first left.