personal security system

stanleylefthandstanleylefthand
in Magnets

would it be possible to attach a small laser sensor in the back of the head maybe tucked into a hat or toque in order to be able to sense when someone is behind you? I think it might be possible with ear implants, amp, and coil.
I have had magnetic finger implants for about a year and I have not tested this theory yet but am wondering if anyone has.

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