I received this email from my uncle and dad. It is great information to know in the event that something like this were to happen. This has been proven by FOX news.
If you should ever be forced, by a robber, to withdraw money from an ATM machine, you can notify the police by entering your pin # in reverse. For example-if your pin $ is 1223, you would put in 3221.
The ATM recognizes that your pin is backwards from the ATM card you placed in the machine.
The machine will still give you the money, but, unknown to the robber, the police will immediately be dispatched to help you.
Just a thought to share