I've been having this recurring dream for the past three years or so. I've heard that, in broad strokes, it's not an entirely uncommon dream. While I haven't had this specific dream before, I've had dreams which are extremely similar.
Okay, so I dream that I'm living back in Hamilton, in the house I lived in as a teenager. Uhm, and, somehow it's transpired that I've decided to go back to University, to get some kind of Masters degree in something not particularly useful. But I've been sleeping for a long time, and I'm not really aware of what day it is. Anyway, I get up early, and I'm asking my mum if she knows where my class is, and my little sister says:
"You've missed three weeks of classes, you'll never catch up, there's almost no point in going."
And I just stand in the kitchen, kind of slumping, thinking: "Well, what do I do now?"
And then I woke up, all covered in sweat and shaky and frightened.
Yesterday me and some friends got together for our semi-irregular band rehearsal. Songs are made up on the spot and, while I'm not very good at it (I usually revert to either joking or screaming), I occasionally step up to the mic and sing some lyrics off the top of my head. One of the lines that came to me yesterday was:
I know I'm treading water
and I know I can't do that forever
but if there's nowhere to swim to
is there any point setting out to?
This is a 
Nice one dude, didn't know you were in a band.
If you watched Channel 4's 100 greatest albums last night you'll know that Black Sabbaths' 'Paranoid' (the title track off the same album) was made up entirely on the spot by a very off his head Ozzmeister screaming crap into a microphone ('Can you help, me occupy my brain', anyone?). The amazing guitary bit at the end of the Stone Roses' 'I Am The Resurrection' was also a totally made up jam session.
"No time is wasted when you are being creative"
-me, just now