Yes, it's true - I unlock my car by jiggling the jacket I'm wearing. The brand of jacket doesn't seem to matter nor does the fabric or style. For all of them I walk up to my car, give my jacket a jiggle, and my car unlocks allowing me to enter.
Maybe it's obvious why this is to some already, but i'll dive in for clarity's sake: I drive a car with keyless entry, and the FOB has a habit of getting stuck behind my phone in my jacket pocket which ends up shielding the transmitter. But giving my jacket a jiggle lets things move about in my pocket, allowing the signal to get out and unlock my car.
