A balloon is positionable in the patient’s descending aorta. A sheet picking mechanism has a pick arm and a pick roller. The transformation may be a linear superposition of transforms, with each transform acting on an input signal or on a component of an input signal. If the player does not choose to cause the gaming device to change the employed paytable, the gaming device determines a game outcome based on the default paytable. Supporting operations on a video stream is also disclosed. A lock pin is housed in a housing hole provided in the other of the first rotor and the second rotor, protruded by the energizing force of an energizing device at the time of hydraulic pressure reduction, to thus abut on the wall of the engaging cavity from an oblique direction to give a relative rotating force to the first rotor and the second rotor.