Taylor described "Out of the Woods" as a song about a particularly fragile relationship. But it also contained lyrics about an accident on a snowmobile ride with her ex, who lost control and ended up in hospital.
During an interview with Rolling Stone, Taylor was asked how on earth she and her famous ex managed a trip to A&E without it being leaked. She said: "You know what I've found works even better than an NDA? Looking someone in the eye and saying, 'Please don't tell anyone about this.' People think they know the whole narrative of my life. I think maybe that line is there to remind people that there are really big things they don't know about."