This is the exact reason why if you pull the trigger and it does not go off, why you point the gun in a safe direction and wait for 30 seconds before attempting to eject the shell.
It is called a delayed detonation, and likely caused by a bad primer that burns slowly instead of flashing, setting off the gun powder
It is also why you do not ever (NEVER-EVER) point a gun at anything that you don't want or intend to destroy and kill.
[youtube]http://www.youtube.com/watch?v=XtkapY3ZfD4[/youtube]
It is called a delayed detonation, and likely caused by a bad primer that burns slowly instead of flashing, setting off the gun powder
It is also why you do not ever (NEVER-EVER) point a gun at anything that you don't want or intend to destroy and kill.
[youtube]http://www.youtube.com/watch?v=XtkapY3ZfD4[/youtube]