Originally Posted by Dakota rube
A 12-inch "mortar" firework will blow a hole in steel plate.
A 10-inch shell puts a basketball-sized dent in the steel.
This, apparently, was at least a 4-inch and possibly a 6-inch shell, both illegal for the general public. An eyewitness said he ran over to the dude after it happened to attempt to aid him, but found nothing above the shoulders.
Post news link if available please.