In a track-by-track interview with NME.com, Amy also said:
I'd say this is the most intimate song on the album. Really, it was from that kind of hard time in 2010 where I felt lost and sort of like I lost my vision for a second.
And it's cool because the song is sort of almost an apology to the fans, for being gone. It's like 'Here's how it went, I needed to run away'. But I miss this, and it's hard and it's painful sometimes and it's this big giant mess of things. .