Airplane noise, the kind you only hear subliminally when you're flying, then the wind picks up, you begin to focus on the turbulence, and about 8:00 in it gets frightening, frantic, lightning-riffs and heavy static interference, like thousands of metal-winged birds slamming themselves into the body of the plane and windows, jamming the emergency exits, tornado ripping and debris cranking. Unfortunately the lo-fi white noise gets pretty monotonous in the middle - 21:00 in is almost indistinguishable from 8:00+ in. Then at 36:00 the rhythm's messing up or skipping a bit, throaty, drumming, more earthy than airy now. At the 37:00 mark it's suddenly shrieking and swirling like they've plucked at a fuzz pedal, but only briefly, then back to the jagged marching of sharp soles. 40:20 returns you to the (now seemingly soft, smooth, appreciated) engine rumble of a steady flight, but there's still that sick feeling in your stomach like something terrible could happen (again) at any second, and fade to black. 7/10 -- April Larson (10 February, 2010)