I found this guy on Youtube making DIY check valves. Then I saw a butter candle he made. Then a makeshift emergency generator.
The guy is quite the MacGyver, but he's the real deal.
All this stuff will come in handy when the zombies start crawling through your windows and you have to live in your miltary grade bunker system under your house.
Or not.
But it's really worth a watch because it's good for stimulating your inventive mind. It's just plain manly cool, too.
Here's a link.