An entertainment system (1019, 2) having a fluid system with a smoke generator (1007, 4), the smoke generator being supplied from at least one pump (1005, 8, 10) connected to at least one container for fluid (1003, 12, 14), which at least one pump (1005, 8, 10) is controlled by a controller (1009, 6), wherein the controller is adapted to perform a shutdown process upon malfunctioning of at least a part of the entertainment system. The shutdown process performs a purge of at least part of the fluid system. Furthermore, a method of operating the entertainment system (1001, 2), has the steps of performing a shutdown process upon malfunctioning of at least a part of the entertainment system, the shutdown process including the step of purging (2009, 3003a, 3003b) at least a part of said fluid system.