I like to experiment with long handheld exposures at night. Most don't work out, but a few do. After a few frames, I was struck by how the trees moving around in last night's heavy wind had a bit of that flame-like quality of some of Van Gogh's trees. I shot a few more until I got one I liked. This was about 2 seconds at f/2.8. Most of the motion is from the wind, but some is also from my hand, although the camera's image stabilization moderated soem of the hand motion.