“Mystery Jack” is a short but dark song about loneliness and death, with a distinctive fuzzy guitar riff and various percussion parts (notably sleigh bells). It was released on Float Along — Fill Your Lungs on September 27th, 2013.
At live shows “Mystery Jack” has been elusive, appearing after four to five year breaks for a handful of performances before disappearing again. The first known performance was on 2013-04-20 at The Governor Hindmarsh Hotel in Adelaide. Based on available data, the song wasn’t played again until August for full performances of Float Along — Fill Your Lungs, starting with 2013-08-21 at the Bar Open in Naarm (Melbourne). After this run the song seemed to fall off of setlists entirely before appearing five years later on 2018-06-21 at Republic NOLA in New Orleans. The song was played a few more times in 2018, with a performance from 2018-10-09 appearing in the video KING GIZZ vs KEMONITO. After a few more years of silence, the song returned on 2022-03-07. After a few rare performances that year, it again disappeared after a Cavs-less performance on 2022-05-31.