Great Idea from one of my clients

I received this idea from a client and thought it was a great idea worth sharing!

Put your car keys beside your bed each night when you are getting ready for bed. Why you ask? Well, if you hear someone outside your house in the middle of the night, grab your keys and set off the car alarm! What a great idea! You have an instant burglar alarm and pay no set up or maintenance fees. Tell your kids, your parents, your friends and co-workers, you never know when this will save someones life! It could even work for someone who has a heart attach or falls and can't get to a phone. Someone would surely become suspicious and call the police if it continued to go off.
Have any other suggestions for this, leave me a comment! Would love to hear what ideas you can come up with!