I got locked out of my car one day, so I called these locksmiths. The guy tried everything - bladder in the window, jimmy'ing etc... Eventually he goes "Ahh well, gotta do it the hard way"...
So he pulls out a blank car key, and a file (to wear grooves in the key), and made a new key from outside the car!!! He tried the key a few times, and filed it a bit more etc etc... In 15 mins he had made a key that opened the door, and started the car as well!!! All of this from outside the car!
Watch those locksmiths!