Taken from the fire control tower during a night fire training exercise in Grafenwoehr Germany. That's an M-60A3 Main Battle Tank firing a 105mm round. Canon AE-1 with 50mm lens on Kodacolor. I held the camera against the wood railing to be as stable as possible. I put the camera on "bulb", opened the lens and waited for the tank to fire. The blast was so powerful it pushed me back a bit and I got a little double exposure which I've cleaned up with Gimp.