Hack an ATM and get $$

This is the collection of ATM manuals(found from some anather site).Basically what you have to do is you change the denomination to $1. So when you select to withdrawl 20 bucks, you get 400 but it only deducts 20 fm your account. :) THe machine thinks its dispersing 1 dollar bills 20 times but the machine is only loaded with 20's

click here to download
I havn't tried this but i heared that it works so try it on ur own risk