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<Ranger responding to report of loud explosion in desert> "We were...disposing of some expired product. Don't worry, it's all gone now."

Public safety people get irritated about explosions that don't serve any purpose. The key is always having a good reason why you're blowing something up. And ideally being the person who called it...

I mean, making a huge air blast without warning anyone first falls more under "bad explosives etiquette."