An air bag assembly for cushioning restraint of an occupant in a vehicle during an impact event. The first and second differential MOS transistors receive first and second input voltages on the gates, respectively, sources of the differential MOS transistors being commonly connected. This invention may be used to arterialize blood vessels in the venous system to prepare them for an exposure to arterial pressures. The personalized information can include, for example, the user’s name, skill level, preferred characters, handicaps, limitations, andor historical game scores.