Safety Not Guaranteed is a 2012 American comedy film directed by
Colin Trevorrow and inspired by a 1997
Backwoods Home Magazine classified ad—itself written as a joke filler by
Backwoods employee John Silveira—by a person asking for someone to accompany him in time travel. It was screened at the
2012 Sundance Film Festival where it won the
Waldo Salt Screenwriting Award.