I was helping my brother change the
oil on his Cutlass Supreme sometime back in the '80's. It was long enough ago that
oil still came in cans. Anyway, he accidentally dropped the
oil can spout down between the battery and the inner fender. That sucker contacted the positive terminal and literally welded itself to the inner fender. Had to hacksaw it off to get it out. The battery didn't explode - we were lucky.