[3] The song was released in a video posted on 13 January 2011 on Paramore's official website.

[6] At Fueled by Ramen's 15th anniversary show in 2011, the band performed the song as a mashup cover with Fleetwood Mac's "Landslide".

In the clip, frontwoman Hayley Williams and guitarist Taylor York perform a demo of the song, which features lyrics that could be read in the context of the recent departure of band members Josh and Zac Farro.

−"Now there's nothing but time that's wasted" −"And words that have no backbone" −"Now it seems like the whole world's waiting" −"Can you hear the echoes fading?"

[8] Williams posted rough audio of herself singing the track's chorus on her blog on Wednesday, and lyrics to "In the Mourning" surfaced days after the band announced the departure of the Farro brothers.