Alternatively, hide your main set of keys and leave the spare out in the open without the battery in it. After a few presses, scum will go to unlock the car manually and alarm will go off. Scum will (hopefully) shit dacks and leg it at this stage. If not, you've been awoken by alarm and promptly armed yourself/called cops/ran outside elsewhere to safety by the time the cunt comes back.

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[I]trolololol[/I]