Low light performance Fuji X Pro 1 iso 6400

So this picture is shot at iso 6400 . Remarkable considering the high iso rating.
It is definitely usable. If it was a matter of getting the shot or not 6400 is the way to go. I was using f1.8 and getting 110th of a second which isnt to bad at all.
I am continually being impressed by what the camera can do.