The tl;dr is basically some 51 year old dude had a laaaaarge cache of weapons and other explosives (e.g. from parachute emergency openers), of which some explod

The tl;dr is basically some 51 year old dude had a laaaaarge cache of weapons and other explosives (e.g. from parachute emergency openers), of which some exploded for unknown reasons, firefighters and police showed up and found the remainder of the stash.