Using a borrowed 5D Mark II set at ISO 6400, I made these three pictures in what, to the eye, looked like almost pitch black settings (safety note: the rooftop had a very high ledge; don't be worried). I had to focus using distance, since I couldn't tell and the auto focus certainly couldn't tell if anything through the lens was in focus. Not the greatest shots, but pretty cool that I was even able to make them.
The Boston sky at midnight.
Dave, lit by his iPhone.
I think this is a fairly accurate portrait of beloved former editor, Dan Atkinson.