Analog film photography and cameras

that's the camera moving during the exposure. was it on a tripod? probaly mirror slap or wind or shaky hands.

I'm not confident it is camera movement, as I would expect all point sources of light to behave the same way: have the same patern of movement. Whilst not that sharp, the window frames in the building to the left of the shard can be resolved. I would have expected these light sources to move around in the same manner as the signature on the street.

There is no chance of mirror snap as the Electro 35 does not have a mirror.

Shakey hands? Almost certainly: there is a chimney in the shot and it belched out a massive plume of black smoke. I have never seen it do this before, it prompted me to take a shot and hope for a lightning strike.

I had also been on the falling over water.