Witnessed a 9mm springs and plastic wonder do the same thing at a public range except the guy was so intent in emptying the magazine in less than 2 seconds, he squeezed of the next round which wasn't a squib.
Of course no safety glasses, he was lucky, gun blew up in his hand, cuts and metal/plastic parts in his hand and face, missed his eyes fortunately.
The good Lord looks after fools and idiots.....