Ive been working on a few meta projects for my wife for Christmas. I was using my 8" bench grinder's wire wheel to smooth the edges on some small 1"x1"x1" angle iron pieces. My grinder is on a stand in the corner of the garage. In front of several shelves I store my spray paint on. Well, one of the brackets got pulled out of my hands and launched out the back exhaust port like many times in the past 25 years. But this time, it punched a hole in a new can of primer. In an instant, I had a fresh coat of primer on the left side of the grinder, grinder stand, the little bracket, part of the shelf, several other cans of paint, a spot on the floor, dusting on my left pant leg, left side of my jacket, my face and goggles. So be careful of your surroundings. You never know.