Ashes Blow

After the end of a barbecue, I found myself staring at the remains of the ashes, and I tried to take some pictures.

I achieved this explosion effect without any photomanipulation, it's very simple actually. With the camera on the tripod, I set a shutter speed of a few seconds during which I turn the zoom ring.
The "Bulb" mod (takes the picture as long as you press the button) is also very useful here, I have noticed.