http://photos-c.ak.facebook.com/photos-ak-sctm/v173/173/62/197814923/n197814923_38318206_7.jpgi think following that link should work. if not just say and ill upload it to photobucket or this site.
its a long thin cage that goes over the wicks with some extra room at the bottem to place the coal. they are held on using some wire and keyrings so they are easy to put on and take off.
in that picture im using sheesha coals as they are small and have a quick light coating. with a dunk in parafin they are ready to use after 30 seconds standing and 10 seconds of quick spinning.
normal BBQ briquets work aswell and last longer than the sheesha coals but they need 45mins in a fire befor they are ready to use. pretty much when they are ready to cook over u can use them for spinning.
if u "bash" the coals befor they are fully lit u knock off all the burning embers so u only get one nice cload of sparks.
in the video i was wearing a short sleeve shirt and once or twice felt a small sting where a spark must have landed on me. almost unoticable but i think it would hurt if u hit ur bare skin with the cage and was hit by lots of them. my jeans arnt damaged in the slightest so the answer is just some loose clothing.