Liquid ejecting guns, e.g. water pistols {, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the pressurisation of the liquid the gun being connected to an external source of pressurised liquid during use of the gun, i.e. at least during ejection of the liquid the external source being a pressurised water supply system, e.g. the municipal water supply system or a water supply system onboard a ship}