Oh no, not another one of these threads! Just push the blasted thing out with your size die. You'll have to take a run at it to have any chance of it going off, and it's only one primer for pete's sake, it not like your defuzing a 500 lb bomb. Slowly push it out, turn it over, put it back in, finish reloading and go shooting. Wearing saftey glasses is prudent whenever your reloading, but decapping and seating both isolate the case so well that even if it did go off it would just make noise. Becarefull if you seat with a hand tool to keep the case pointed away from your face, I've never managed to set one off (yet) but I've accidently pushed a few into IVI 9mm cases that took way more force then you'll ever generate decaping and they where fine, (ok, a little flat, but they worked, I toss that stuff out now when I find it).