Adding life to images through shutter speed.
The above walking shots are examples of how shutter speed can blur people. The closer the movement is to the camera, the more blur there will be.
Slow shutter with flash
Great for dancing, to add emotion and life, while retaining sharpness in people. Nice blur surrounding them and fast moving parts of the body. Much more visually appealing than freezing people in time. It will also give you some light in the background so you can see where they are.