So illogical. He just assumed some survival situation was in effect as soon as he heard the sirens. Should've waited for more info on the scenario. He had the gun, he could have shot or beckoned them out at any point. ... I guess thats the joke.
How'd they get the authorities to sound a false alarm? How'd they sneak 50 people into an attached shed while moving all his prepper shit without him noticing? Where did they park their cars? Aren't most preppers ready to 'bug out', not hole up in a shed? Why would so many people show up to a party for a guy who is clearly an asshole? You can't even talk about guns without getting arrested in europe so no way in fuck does he have a modern pistol. And where is all his prepper gear? Why kick the women out, wouldn't you want to be able to carry humanity on?