Brian Hart creates these really cool light painting photographs by using exposure times up to 20 minutes long. Now that's what I call bending light! These images are so detailed that I can't help but wonder what sort of reference he uses while the shutter is open.
http://cubeme.com/blog/2011/10/31/light-painting-photography-by-brian-hart/
The alternate method I though of was that the people and chairs were there, everything was black and the light was traced around the objects while there were there.