I let my loose T-Shirt get too close to my cordless drill one day while drilling a hole, it caught my T-Shirt and even though I noticed right away by the time the drill spun down from drilling speed, it had better than 3/4's of my ripped apart T-shirt wound around the chuck. Luckily I was strong enough to keep the drill from pulling into my body. I was very lucky that day and since use extreme caution with even battery operated tools. Dremels are no different than any other power tools. Good topic here!