Don't think it was posted anywhere before, briefly searched the forum. (Saw it on another forum)
http://www.seattleairsoft.com/module...php?storyid=15
Seems to be fairly accurate. (Way more accurate than the pop can chrony)
Though they could of used something safer instead of using 2 stools. Fairly practical if you have a laptop to bring to your "shooting range" since shooting an airsoft in your living room or bedroom isn't exactly the greatest idea.
Wear your goggles/mask if you're going to try this