One new design of an interesting and shocking microscale palm mine for demonstration in interesting chemistry course is described. The new design consists of a mobile phone lighter, a plastic film box, a two-way plastic stopcock, a balloon and some small materials. The microscale palm mine includes two safe chemical guns without any battery, a microscale alcohol gun and a microscale hydrogen gun. Shooting is best accomplished by igniting the safe mobile phone lighter without any butane in this improved design. A very loud "BANG" sound can be heard and a brilliant flame confined in a balloon can be seen by shooting with the microscale palm mine. From the considerations of low-cost, safety and interest, the microscale palm mine will make models of combustion and explosion studies enjoyable for teachers, students and the public.