Gathering storm

I've been playing with the little iSight camera on my MacBook Pro, and the time lapse mode in iMovie. It looked like rain, so I rested the laptop on my windowsill for a few minutes and captured this.

Time-lapse stuff has always fascinated me, particularly of stuff that's just on the edge the bounds of human perception, like the movement of clouds.

The little specks you can see are rain, the heavens opened just after I stopped recording!