Creator/CirqueDuSoleil's eighteenth show was billed as a "live music event" -- perhaps the best way to sum up a 2006-08 arena concert tour of North America and Europe based around rewritten/rearranged versions of songs from the company's "typical" shows. It wasn't a JukeboxMusical, but included a typical Cirque plot and acrobatic feats. Most of the shows from ''Saltimbanco'' through ''Varekai'' were represented via songs.

The program summed up the plot thusly: "On a tightrope stretched between two worlds, a dreamer searches for his heartbeat." More specifically, said dreamer is Bill, a young man travelling by balloon to find his place in the world and purpose in life, encountering a few bizarre characters and a woman who might be his soulmate along the way.

A film compiled from the final performances was released by Sony Pictures as a limited engagement in North America in August 2008; it has not been released on [=DVD=], but in 2013 was one of several Cirque programs made available as a video-on-demand title via digital cable providers.

Not to be confused with the [[Literature/{{Delirium}} novel of the same title]] by Laura Resrtrepo, or the young adult Literature/DeliriumSeries of books.

!!!This show contains examples of:
* AllJustADream: Once the show added narration, it explained that what happens in this show is the hero's dream.
* {{Balloonacy}}: Bill gets around via one ''big'' balloon.
* CutSong: "Walk on Water" (adapted from ''Theatre/LaNouba'''s "A Tale") lasted long enough in the show to appear on the soundtrack album. "Let Me Fall" (''Theatre/{{Quidam}}'') was gone by the end of the North American leg -- given that it was the one song audiences unfamiliar with Cirque might recognize via Josh Groban's CoverVersion, this was surprising.
* TheElevenOClockNumber: Aptly, "Time Flies" is ''about'' the story approaching its ending.
* TheEveryman: Bill.
* EverythingsBetterWithSpinning: The hoop-twirling performer who gets the spotlight for "Cold Flame".
* FauxlosophicNarration: Note that this was only added in the {{Retool}}.
* ItWasWithYouAllAlong: The first two songs in the show with lyrics -- "Too High" and "Time to Go" -- have their singers asking Bill why he can't see that the answers he seeks by setting out on his journey are already inside him and before him. By the end, he realizes that they are right; his place and purpose come to him when he connects with the people around him.
* RearrangeTheSong / RewrittenPopVersion: The show is based on doing this with Cirque songs.
* {{Retool}}: By the end of the North American leg of the tour, narration was added to explain the plot; there was also a new, lively prologue with much of the cast beating on drums.
* SceneryPorn: Via projections on giant, translucent screens that spanned the stage.
* {{Sidekick}}: Cerbere, a sort of grouchy-but-friendly demon (performed by a stiltwalker).
* SingingSimlish: Averted for most of the show via the new lyrics in real-world languages, but "Kumba" ("Kumbalawe" from ''Theatre/{{Saltimbanco}}'') is still in [[Main/FanNickname Cirquish]].
* SpeakingSimlish: Cerbere.