This one is one of the few keepers from that evening/night. There was very little light and I was very thankful to have both SR and the K-5 sensor! I had huge problems focusing as I basically didn't see anything in the viewfinder.
I did actually manage to get one or two usable pictures later that night using ISO 51200, f/1.2 and 1.5 sec exposure hand held, IMO that's insane. To put it into perspective taking the same shot with the K-7 and a 2.8 zoom would have required an over minute exposure time!
K-5 @ 51200, K50/1.2 @ 1.2, 1/10 sec. Some NR in lightroom but nothing too much.