A non-therapeutic method of treating human skin, hair and/or mucous membranes comprising: (a) providing a personal care composition in a container under pressure in the form of a stable oil-in-water emulsion comprising: (i) a continuous aqueous phase comprising water; (ii) a discontinuous phase comprising foam forming component(s), trans-1-chloro-3,3,3-trifluoropropene (1233zd) and trans-1-3,3,3-tetrafluoropropene (1234ze), wherein said 1233zd and said 1234ze together comprise from about 40% to about 60% by weight of said personal care composition and are present in a trans1233zd:trans1234ze weight ratio of from about 1:8 to about 8:1; (iii) an emulsifier having an HLB value of from about 7 to about 18 and which may be present in the continuous and/or discontinuous phase; (iv) one or more active ingredients which may be present in the continuous and/or discontinuous phase; and (v) optionally one or more auxiliary gel, lotion or cream forming components which may be present in the continuous and/or discontinuous phase; (b) dispensing said personal care composition on and/or into the skin, hair and/or mucous membrane of the human being treated by discharging at least a portion of the personal care composition from said container into ambient pressure conditions to form a foam. (a) providing a personal care composition in a container under pressure in the form of a stable oil-in-water emulsion comprising: (i) a continuous aqueous phase comprising water; (ii) a discontinuous phase comprising foam forming component(s), trans-1-chloro-3,3,3-trifluoropropene (1233zd) and trans-1-3,3,3-tetrafluoropropene (1234ze), wherein said 1233zd and said 1234ze together comprise from about 40% to about 60% by weight of said personal care composition and are present in a trans1233zd:trans1234ze weight ratio of from about 1:8 to about 8:1; (iii) an emulsifier having an HLB value of from about 7 to about 18 and which may be present in the continuous and/or discontinuous phase; (iv) one or more active ingredients which may be present in the continuous and/or discontinuous phase; and (v) optionally one or more auxiliary gel, lotion or cream forming components which may be present in the continuous and/or discontinuous phase; (i) a continuous aqueous phase comprising water; (ii) a discontinuous phase comprising foam forming component(s), trans-1-chloro-3,3,3-trifluoropropene (1233zd) and trans-1-3,3,3-tetrafluoropropene (1234ze), wherein said 1233zd and said 1234ze together comprise from about 40% to about 60% by weight of said personal care composition and are present in a trans1233zd:trans1234ze weight ratio of from about 1:8 to about 8:1; (iii) an emulsifier having an HLB value of from about 7 to about 18 and which may be present in the continuous and/or discontinuous phase; (iv) one or more active ingredients which may be present in the continuous and/or discontinuous phase; and (v) optionally one or more auxiliary gel, lotion or cream forming components which may be present in the continuous and/or discontinuous phase; (b) dispensing said personal care composition on and/or into the skin, hair and/or mucous membrane of the human being treated by discharging at least a portion of the personal care composition from said container into ambient pressure conditions to form a foam.