Greatest (Non Musical) Album Opener?
 

Very hard. Can't think of one at the moment but I'll probably add one later.

The beating heart and all the mayhem that follows on the opening to Dark Side Of The Moon.

The year 2000 dance album "Transcendental" Euphoria 'Mixed by Dave Pearce' begins with (CD1-Track1) Don't Leave 'euphoric mix' by Faithless. The track starts with a door being opened, someone walking, then coughing, and clicking their fingers. It also has the sound of wind blowing, which gives the album an amazing 'non-musical' beginning, recommended to be listened to if you have an excellent sound system.

the "one, two, three, four, one, two, four" creepy brit voice at the start on revolver by beatles.

Eve Libertines "Asylum" speech on Feeding of the 5000

Gorillza- M1A1

"Hello? Helloooo!? Is anyone their!?"

haha

The 12 inch version of Gary Moore's "Over The Hills And Far Away" with the footsteps fading from one speaker to the other and opening door.

The weird gregorian style chants at the begining of Tarkus.

The intro to Iron Maiden's Prisoner is quite cool