A method for indicating abnormal data-inputting behavior includes inducting and connecting an identification end with a control system. In the cascading symbol game, a gaming device generates and displays a symbol from a plurality of symbols for each of a plurality of symbol positions. An amplitude of the cardiac signal following delivery of the pacing pulse may be referenced using the baseline amplitude. The graphical output is simplified to only a few colors to differentiate only background and irrelevant objects from relevant objects. Image signals and audio signals are transmitted between the camera and an external processor, information describing the status of the camera is transmitted from the camera to the external processor, and commands to control the camera are transmitted to the camera from the external processor.