WHILE ATTEMPTING TO CHANGE A FLAT TIRE USING THE FACTORY SUPPLIED VEHICLE JACK, THE JACK FELL OVER AND CAUSED THE VEHICLE TO FALL, PINNING MY HAND IN BETWEEN THE SPARE TIRE AND THE REAR LEFT FENDER. THE VEHICLE WAS STATIONARY AT THE TIME WITH THE EMERGENCY BRAKE ENGAGED. MY HAND WAS PINNED FOR ABOUT 3-5 MINUTES BEFORE MY SON AND A GOOD SAMARITAN WERE ABLE TO LIFT THE VEHICLE OFF OF MY HAND. I LATER HAD X-RAYS DONE, WHICH WERE NEGATIVE. MY HAND WAS CUT AND BRUISED, SO I DID HAVE TO GET A TETANUS SHOT.