HowTo: Build a Parasitic Bike Pump That Steals Air From Car Tires

Aleksi of Instructables has a genius idea. Bike tires out of air? Not a problem. That big old car down the street has some air to spare. Just insert Aleksi's pilfering emergency bike pump into any random car tire (make sure you're out of eyeshot, a look-out may be necessary) and siphon away. 

You Will Need:

• A 50cm-100cm long air hose
• Two chucks

Build-your-own.