Pink Floyd - One Of These Days

"One of These Days" is the opening track from Pink Floyd's 1971 album Meddle.^[1][2] 

The song is instrumental except for a distorted, low voice that says 

"One of these days I'm going to cut you into little pieces"

You can learn more about this song here in Wikipedia.org:
http://en.wikipedia.org/wiki/One of These Days/Pink Floyd song

Video extracted from the DVD Pink Floyd Live @ Pompeii (The Director's Cut)