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- and low-level classification is typically more concerned with individual components within the system and how they operate. Features which emerge only at a high level of description are known as epiphenomena. Due to the nature of complex systems, the high-level description will often be completely different from the low level one; and, therefore, the (different) descriptions that each deliver are consequent upon the level at which each (differently) direct their study. For example, High- and low-level High-level and low-level, as technical terms, are used to classify, describe and point to specific goals of a systematic operation; and are applied in a wide