Red

I had one eye on the sky as I quickly finished varnishing some outside wood. By the time I'd packed up and reached for the camera, it looked like the sky had gone too dark. A rush upstairs, fling open the window and managed to blip this before it disappeared.

If the camera meter is to be believed, within a minute and a half, the exposure changed from ISO 140 to 400, with the same shutter and aperture set.

Apart from the crop, this is SOOC.