A vehicle chase game includes a first game object and a second game object. The regulator valve provides a controlled pressure rise to a torque-transmitting mechanism within the transmission during a shifting event, and the boost valve is effective to increase the fluid pressure from the regulator valve to the torque-transmitting mechanism when the shift event has been completed, thereby providing a high pressure at the torque-transmitting mechanism to prevent slipping. The third voltage is controlled separately from the second voltage. The spacer includes a body defining a bone healing surface, wherein at least a portion of the bone healing surface has a coating which includes a therapeutic agent, a polymeric carrier, and a buffer medium to stimulate bone growth andor promote fracture healing. The top seat and the top cover are securely held together in such a way that they work together to confine a staple which is discharged by the stapling gun, thereby ensuring the accuracy and precision of driving staples. The lamp may further include a cover.