A method of photographing a simulated activity includes a stable photographic platform that enables an individual to safely mount an item of equipment or a safety surface adjacent the item of equipment so that a photograph may be taken. The Darlington transistor pair may be configured to generate an output signal at an output node in response to an input signal received through an input node. The gate and the sourcedrain are respectively deposited on the substrate and are separated by the insulating layer on the substrate. R2 is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 25 carbon atoms.