DON’T fall for the hoax that if you are being held up at a ATM, you just enter your PIN backwards to call the Police! It is simply not true!
Firstly it would require all the banks to update their software to implement, secondly what happens to those people with reversible PINs? Eg 7887, 8888, 0110.
In the rare chance you do get held up, remember your life is more valuable than any money. Plus there is a chance Police will be able to identify them afterwards from ATM and local security cameras.