For Safety Purposes

It is always good to hold your car keys or any keys like this as a precaution. In case you have a situation like the following:

Stay cool, and wait for your best shot. Once you got him or her, run as fast as you can. And don't forget to make a police report.

Ladies who walk or stay lone, do take note. This might not hurt him terribly but it will buy you some time to escape.