All I want is you.. and to waste 3 minutes of your time.

So about 1 year ago I discovered the absolute amazingness of U2 even though my friends think Bono sounds like he is a crackhead. The only album I own is the Best of 1980-1990 even though I have a lot more on my iPod. So I noticed that on the back it says the song All I want is you is like 6 minutes, but it turns out that there is 2 minutes of nothingness and then at the 9 minute mark, a piano starts playing and Bono starts singing about something that I can't remember right now. I wanted to know if this was a bonus or something or if that is actually part of the song.