The fuselage shutters and creaks. A flight attendant leans in and whispers “You are already in the luckiest seat.” Later, you may swear you felt her breath in the pitch-black darkness. She was that close. Or so she seemed in “Flight,” one of three multisensory experiences unfolding in shipping containers unloaded onto a gravelly, fenced lot in Denver’s River North Art District. “Darkfield” is the title of the trilogy, but also the moniker of the inventive outfit that created “Flight,” “Séance” and “Coma,” all of which are presented completely in the dark.