3D Laser scanners

I went to the Detroit Auto Show this week, and at the Ford display,
they had a 3D "human scanner". It was a booth that had a 360 degree laser
scanner that traveled from your head to toe, and in about 5 seconds, put out
a 3-D picture of you on a computer screen outside the booth. It captured
loose hanging hair, folds in clothing, etc... It was a visible red light
laser, (unless that was for show) and it took about 5 seconds to travel from
head to toe. I looked behind the scenes, and it appeared to be all
controlled by 1 or 2 large tower PC's. I have no idea how it worked.
A very nice toy.
Brad