It could just be a thunderstorm, though.
You've done it. You've just brewed the best beer to ever touch your tongue, so zip up your KR3W Beers Full-zip Hooded Sweatshirt and safely deliver the recipe to your secret fallout bunker deep in the mountains. Something this great has to be kept for future generations and you can be the loyal bearer. Hunker down and let this cotton and polyester hoody keep you warm while you wait out the apocalypse.