Just noticed that. Strange, ideed.
The same goes with Bohemian Rhapsody - after "Mama, (way the wind blows)" you can hear some strange sound, something like this: "We got it". Maybe that's just my brain, but sure there is something...
I'm not sure about the time. Some different cd edits have minimal differences in the time, like 1 or 2 secs. The sound I mean is in 3:04, while MexQueenFm said it was 3:02, so it's possibly that the mp3 I have has two additional secs of silence at the beginning.
The point is that I've listened between 3m and 3m10s and still don't hear anything like what's being described.
Try a sequence of sounds to guide people on the board. That's the clearest way to get the point across, e.g. bass twonk then drum rumbling then...etc. etc.
Adam.