Have you ever wondered why cars in horror movies never start the first time the ignition is cranked? Jason Torchinsky solved the mystery when he "was able to find this revealing diagram in the underpants of an unconscious key grip on my lawn." Read all about it at Jalopnik. Link -via mental_floss
This might actually be doable. I mean if you're in a rush you'll probably turn the key faster and harder then normal, and sensors can pick this up and disable the ignition circuit accordingly.
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