You can turn any car into a submarine to hell with one number change.
GTA VI Iran
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You can turn any car into a submarine to hell with one number change.

By modding a single value in the handling.cfg file — changing a vehicle's 'float percentage' to any negative number — that vehicle will instantly teleport to Blue Hell the moment it touches water, as if the game decides water no longer exists for it.

Source: Blue HellCC BY-SA

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GTA VC Blue Hell — the void your ride permanently nosedives into after that one handling.cfg tweak.
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GTA VC Blue Hell — the void your ride permanently nosedives into after that one handling.cfg tweak.

San Andreas Blue Hell from below the map — the exact drop zone when negative buoyancy makes water literally cease to exist for your vehicle.
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San Andreas Blue Hell from below the map — the exact drop zone when negative buoyancy makes water literally cease to exist for your vehicle.

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