I love seeing stuff like this. Instructables has a tutorial on how to steal air from a parked car’s tires to fill your bicycle’s tires up. Pretty clever, just don’t get caught and make sure you’ve got a presta adapter!
Don’t forget to read the comments too. This one cracked me up:
“Low tire pressure causes decreased efficiency. That Hummer will pollute more as a result of its lower tire pressure.”
Oh, the Internet.