How does Nikon D3 100 zoom in the middle of shooting to make the picture appear relatively fuzzy "explosion effect"

Focus first and press the shutter half. At the moment when the shutter is completely pressed, hold the focus ring in your left hand and rotate it quickly, and you will get the desired effect.

Key point: 1, the camera should be stable. 2. The shutter speed should not be too fast. 3, once is not necessarily good, try several times, it is a number anyway. Wish you success!