If a criminal NPC tries to jack your car through the passenger door and you drive away at the exact right animation frame, they'll end up in the passenger seat while the car becomes AI-controlled — stopping at red lights and driving autonomously with you helpless in the driver's seat.
Source: Glitches in GTA Vice City — CC BY-SA
Tommy looking folded in the driver's seat, same energy as when the AI jacks your ride and you're just along for the law-abiding cruise.
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