Well, a week ago I was bored and wanted to try something new. I picked up my video camera and experimented with the effects. Then, I learned you can somewhat recreate the sprint commercial.
This effect is limited, but I think most of the time it will do the job.
a video camera with a "night" effect.
a tripod (or flat surface, where the camera will not move)
a small led light (don't have one? I'll explain what to do later.)
Step 1: Finding a "night" effect
This is most important part of the effect, you must find something like this for it to work.
If there is another way to do this, please comment.
Step 2: Filming your line of light.
Turn off all the lights, put your camera on the tripod, and turn your camera on. As soon as you are ready press record and move your light in front of the camera as you want it to appear.
A couple tips:
1. The faster your light goes, the longer the line
2. The slower your light goes, the shorter the line