Whether people do this intentionally or not, we all shake to some degreee, whether it's neurological or just your breathing pattern. On nightshot mode on most of the modern digital cameras, you can produce stunning effects by moving the camera when the shutter is opened trying to gather enough light for a picture. Here I took a picture of a light on my dehumidifier, making small circles with the camera as the shutter was opened, then moving quickly to the final spot where I wanted the detailed picture to come out, and this "orb" on the freezer is the result. I took over 200 pictures before I was able to replicate this effect with ease, and figure out the exact camera mechanism causing this effect. Again, become familiar with your camera and if you see something out of the ordinary, try to spot a source for the unusual light sources showing up in your pictures. Our Mt. Carmel picture of the fan with the circling light had no light source of any kind and only flash mode was used, which eliminates the long exposure as associated with nightshot mode.