An outtake from the In Through the Out Door sessions recorded in 1978, this song was remixed for Coda, an album of unreleased tracks. A different version appears on Led Zeppelin's 1993 boxed set.
This was one of three songs recorded for the In Through the Out Door album but didn't fit onto that album. The other two were "Ozone Baby" and "Wearing And Tearing."
Though this song was never released as a single, it hit the US Billboard Top Tracks chart (based on airplay alone) at #4 anyway. Just one more testament to how badly the fans would miss Led Zeppelin, knowing that this album was their swan song (barring reunions).
Led Zeppelin is one of the most famous bands in history to have never gotten a #1 hit single on the US Hot 100. They only mustered one top-10, with 1969's "Whole Lotta Love." Only five other Zeppelin songs scored in the top 40!