Frame pump. Tube in a wedge pack with a dollar bill and a small amount of duct tape in case you need to make a boot. It's a good idea to put a mini cable lock on your wedge pack though. I've had tweakers steal one of those before for God only knows what reason.

I'm gonna hop in here to echo what the other guy said. Works great inside Springfield, and other towns. Out in the country can be a little hit-or-miss depending on where exactly you go. There are very, very few places where I lose cell service entirely, but there are small spots here and there where data won't work.

They covered it in General Biology 1 at my college (the BIO101 course). The book even had cool pictures of the main protein involved in ATP synthesis, which spins around like a little motor or generator.

Check it out