if you've never done this, then you're missing out.
camera settings: iso - 100, aperture - 5.0 or around there, shutter speed - 20 seconds or so
instructions: you're going to need some sort of long chain or rope with a stainless steel disk. put the wool in the disk, and rub the end of a nine volt battery on it. the wool should turn into a burning ember. now its easier to have a couple people for this so you can take the picture while someone else swings. it looks the best if they swing it while slowly turning in a circle. afterwards have fun showing people your sick pictures!