Car keys-have you heard of this trick to stay safe?

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My mother sent an e-mail that was car keys in the subject area. I thought it was very helpful and thought that I would share it with all of you. At night put your car keys beside you when you go to bed. If you hear someone in your house you can push your panic button on your car and scare the intruders away. Also if you have elderly parents have them put there keys in their pockets when they go outside. that way if they fall and can't get up they can push their pantic button and some will be more ampt to hear.Just thought I would pass this on.