I had fun practicing shooting flash at night close up with the Leica Q and Leica small flash. Set it to TTL (auto) and shoot away for some cool effects. This shot turned out a little too hot so I will dial it back a notch next time, although it really depends on the distance from the camera flash to the subject.
This technique is not with out its issues as it is very invasive and some say out right rude. Bruce Gilden in NYC from Magnum Photography has made an entire career based on this one shot. You can also do this during the day to make your subject pop out from the background.
Pro note: I need to be close, about 3 feet away and crouched down, shooting up for full effect with the 28mm lens. It also helps to shoot from the curb back into the building as in this shot as it provides a better background.
I will try more of these shots and see how they turn out.
My friend Bob in Tokyo, 2015.