Camera: Nikon D3000
Lens: 18mm-55mm Kit Lens
Settings: Manual w/ Flash
Speed: 1.0s
Aperture: f/3.5
This shot is also known as "Ghost Effect" as you can see, subject's body is somehow transparent. Subject's image is immediately captured at the instance of the flash, then quickly moving away to capture the background at the back hence the transparency effect.
Here's another photo of the experimental method:
