I once had a semi-auto handgun malfunction to the point that there was a live round in the receiver but not in battery, and I was unable to move the slide to extract the round. In other words it was locked half in battery, half out. Fortunately it happened at my local range so I was able to fiddle with it for a few minutes without endangering anyone. I finally called a gunsmith I trust who just happened to be open on a Saturday afternoon, and took it to him for resolution. He took care of it in about five minutes. Full disclosure - the problem was induced by yours truly by installing one of the recoil springs incorrectly, I.e., backwards. After firing a couple of times the incorrectly installed spring slipped past the end of the guide rod and locked the gun up. I was negligent in putting the gun back together even though I’d done it hundreds of times. No harm was done in the end. Problems with guns are always caused by the operator. This kid’s discharge was negligent, not accidental.
I shold include that the gun had nested recoil springs. I had no idea there was a right and wrong way to install the larger spring. I do now.