There's two steps to this quick and easy way to unlock old-school car doors. Being locked out sucks and now, with a simple tutorial, you can unlock any car door that has these protruding locks.
Please, only unlock your own car door with this method.
The first step is tying the knot.
Once you've got it tied and ready; you have to slip the string in through the car door, fish around for the lock, tighten the string and pull.
And with that, you've gotten yourself out of a jam. Internet tutorials are ground breaking.