Abstract: An anti-hijack system which includes a nozzle arranged to be normally hidden from view mounted on the front section of a vehicle in the window well of the front windshield in such manner that the spray therefrom will impinge upon a person outside the vehicle and in the vicinity of the driver's door. As an alternative this can also be for both the driver's side and the passenger's side. The nozzle includes a diverter positioned to provide both cone and flat patterns of spray according to the arrangement thereof, and a spiral fluid director is positioned to effect the fluid spray as it ejects from the nozzle. There is a reservoir of incapacitating fluid adapted for mounting on a vehicle and hidden from view and a pump for forcing fluid from the reservoir through the nozzle under pressure to spray the fluid outwardly of the nozzle. If desired, a hot cap type capacitor can be used to provide voltage regulation so that vehicle voltage is always available for energizing the pump.