You know when you see a shot which you must have - but you have only got your trusty pocket CyberShot in your pocket?
Is it better to select a low ISO, wedge yourself in, hold your breath and take? Or, find a convenient resting place for the camera - then take? Or leave it on Auto (ISO) and live with the graininess?
I simply can't hoik my Nikon around with me when working, but I always have my old digital Sony ready - which is fine in good light levels but not so good in low.