Useful ATM trick that can save you from thief

If you are ever forced by a thief or someone to take money out of an ATM machine, enter your pin number reversed.
So if your number is 1254 mark 4521.

The ATM machine will give you your money, but will automatically recognize this as a plea for help and will alert the police unknown to the thief.

This option is in all ATM machines, but not many people know this.