[SpookyZalost]

You know, I've actually been looking into a trunk mounted directional microwave beam cannon for exactly this, should be safe with a short range of about 20 feet and any car newer than about 1967 would have its computer reboot causing the engine to stall and forcing them to stop without hurting anyone or anything.just have it pointed rear, and keep it hidden in the trunk since it goes through the frame. Can be made as small as a suitcase. Wouldn't use on highway for obvious reasons.