The most dangerous thing in Vice City isn't the gangs—it's the random civilians behind the wheel.

In GTA: Vice City, some NPC drivers spawn with bizarrely aggressive behavior, speeding recklessly and plowing into buildings, pedestrians, and even the player without warning. Fans long debated whether this was intentional 'realism' or a glitch, and the glitch theory has become the dominant explanation in the community.

Source: Deadly Drivers (GTA Vice City) — CC BY-SA