function kara()
    local gracz = getVehicleOccupant(source)
    local auto = getPedOccupiedVehicle(gracz)
    if (gracz) and (auto) then 
 		vmaxstart = getVehicleHandling(auto, "maxVelocity")
		predkosc = getElementHealth(auto) / 5
		setVehicleHandling(auto,"maxVelocity",predkosc)
		if getElementHealth(auto) > 900 then
			setVehicleHandling(auto,"maxVelocity",vmaxstart)
		end
    end
end
addEventHandler("onVehicleDamage", getRootElement(), kara)