According to Alt-J frontman Joe Newman, this minimal, ominous track was written about "the lingering of an old flame and the physical intimacy shared with that particular individual."
The song's music video is a modern take on Renaissance painter Raphael's School of Athens. Asked by NME why the clip features a rottweiller, keyboardist Gus Unger-Hamilton replied: "It was meant to be some sort of 'status dog' I think. You'll notice others in a scene are taking pop. It's an edgy video."
An Awesome Wave won the 2012 Mercury Prize, which is awarded to the best album from the United Kingdom and Ireland.
Newman explained the lyric, "'Til morning comes, let's tessellate" to NME: "I wrote it when I was going out with my ex-girlfriend," he said. "I told her it was about spooning, but I've been telling everyone it's about sex! Now I don't know!"
He added: "I started going out with someone else and the song's about getting over her while I was going out with my new girlfriend. The line 'Chunks of you will sink down to seals' is about her memory being ripped apart."
The line "Three guns and one goes off, one's empty, one's not quick enough," is a nod to the ending of the spaghetti western, The Good, the Bad and The Ugly.
This song's couplet, "Triangles are my favorite shape. Three points where two lines meet," was voted by readers of NME as their favorite lyric of 2012.