Hunting High and Low track was remixed as a dance version, which was a top-5 hit on the U.S. Dance chart, and B-side to the single and remix was the otherwise unreleased "Driftwood." "Train of Thought" saw limited release as the third single in Europe. It was not released as a 7" in the United States but received rock radio play and a set of remixes again made the dance charts. Waaktaar based the lyrics for this song on existentialist authors and poets Gunvor Hofmo, Knut Hamsun and Fyodor Dostoevsky, his favourites at the time. It was A-ha's third consecutive Top 10 single in
High–low system High-Low Principle, but with a twist on the original design. The GP-25 40-mm grenade launcher fits under the assault rifle and fires a caseless projectile that is muzzle-loaded. Instead of having a case, the high-pressure chamber is located on the rear of the projectile with ten vent holes, in which the launcher barrel acts as the low-pressure chamber. The ignition of the propellant gases also causes the drive band to engage the launcher grooves, similar to the American Civil War Parrott muzzle loading rifled cannon. While little documentation exists, in the 1950s the Soviet Army developed 73-mm cannon for wheeled