A decommissioned World War II-era destroyer docked near downtown Buffalo in New York is taking on water and listing...
Very Dangerous 120mm Mortar Misfire
"The mortar has an extra propellant charge (those "donuts" above the fins) and the heat of the barrel from constant firing ignited it because the dummy held it there for too long. And no the shell would not have gone off when dropped as it is only primed after it has been fired, thankfully for the people standing around"