In the middle of a loud, hectic song, I love it when a band 'take it down, take it right down' (as Iggy once said) - the guitar's reduced to a tiny strum, the percussion to a tickle on the cymbal.

There's a tension because you don't know how quiet they can go or for how long. But at some point the band are going to come roaring back louder and faster than ever.

I love the live versions of Sister Ray for that reason - the quiet lead guitar, the 'Who is that knocking?' vocal, the drums coming in and the song picking up pace and intensity again.

Or Shout by Otis Day and the Knights in Animal House - 'a little but softer now, a little bit louder now'.

Here are Van Morrison - Cyprus Avenue and Glenn Miller - In the Mood

What about you?