A young man was trapped beneath a vehicle after the jack failed Saturday afternoon.  Stony Hill Volunteer Fire Company responded around 2:30pm and found the man conscious and alert, but unable to move.  Firefighters used their HURST Jaws of Life hydraulic spreaders and the T and J Rescue Enterprises TL-9 stabilization device to lift the vehicle off the young man.  The patient ultimately refused transport to the hospital after being evaluated by EMS on scene.