My Pop bought two identical Interarms rifles. One a 270, the other a 375 H&H. One day while shooting he handed me what I thought was the 270 to "finish fine tuning the scope". "Already loaded", he said. I got into the sling, leaned forward on the bench, very tight, squeezed the trigger, and took the scope off with my forehead.
I've may have shot worse, but if so they didn't hurt as bad.....