I’ve wanted to try this for some time now. I have used laser pointers during long exposures for years now. Within the first week of this project I actually had a picture where I used a laser pointer in a long exposure: see day 7: https://victoriajudy.wordpress.com/2012/01/07/day-7-january-7-2012/]
I saw a fellow blogger (I don’t remember who at the moment) try this with a chair, and it was pretty cool. So I put the idea in the back of my mind, and today I attempted it for the first time, using my wonderful assistant/my wonderful husband. I really like the way it turned out.