A Homemade Crossbow Designed To Impale A Car Door

Rebuild Hackett is Popular Science's intrepid DIY ​columnist. Becky Stern English philosopher Thomas Hobbes believed that men living in anarchy would lead "solitary, poor, nasty, brutish, and short" lives. So as much as I'd enjoy rebuilding civilization from piles of trash after an apocalypse, I'd first worry about a way to send petrol-marauding punk rockers scrambling and make infectious zombies take a dirt nap. A gun would do the trick. That is, until my ammunition ran out. Then I'd just hav...