专辑主题取材自1959年和1960年的一次极限探索，一次拿下世界纪录穿越大气层的跳伞挑战，而该挑战也是拿下了当年的最佳纪录。

Project Excelsior was a series of parachute jumps made by Colonel (then Captain) Joseph Kittinger of the United States Air Force in 1959 and 1960 from helium balloons in the stratosphere. The purpose was to test the Beaupre multi-stage parachute system intended to be used by pilots ejecting from high altitude. In one of these jumps Kittinger set world records for the highest parachute jump, the longest parachute drogue fall and the fastest speed by a human through the atmosphere. The record for fastest speed by a human through the atmosphere is now held by Felix Baumgartner of the Red Bull Stratosproject.