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Me and some friends went to movies, left my car behind. An old truck. We came back to finding the truck on other side of road.

After much WTF. Friends dad comes out and let us know he moved it due to street sweeper.

His same brand, but Older and different Model truck key fit mine.

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In university I had an old Crown Vic that somehow didn't need keys to start. You'd just grab the ignition and twist it and it would work whether or not the keys were inserted. It also had a keypad on the outside so keys weren't necessary at all.

Had a couple friends decide I'd be OK with them borrowing it for 20 mins to go grab groceries or whatever, and more than a few occassions where it was parked in a different spot than I left it.

Like most keys, there are only a limited number of possible combinations. There are literally thousands of cars on the road that use the exact same keys not to mention, as the tumblers get older, and you keys wear down, they become less picky about unlocking for other keys.

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