article_snippet: A necropsy revealed that the tranquilizer dart entered a mountain lion that wandered near a southern California mall's chest cavity and delivered the tranquilizer to the cat's lung tissue, the Press Enterprise reports.
article_snippet: Brennan said that though the tranquilizer is safe when entering a muscle tissue, the tranquilizer can be fatal when delivered to the heart or lungs.
article_snippet: Fatal: An official said that  though the tranquilizer is safe when entering a muscle tissue, the tranquilizer can be fatal when delivered to the heart or lungs .
article_snippet: A spokesman with the department said that the department is rare for an animal to die after being struck with a tranquilizer, and when one does, it is usually due to the dart damaging a sensitive area like the spine -- or, in this case, the lung .
article_snippet: A spokesman with the department said that the department is rare for an animal to die after being struck with a tranquilizer, and when one does, it is usually due to the dart damaging a sensitive area like the spine -- or, in this case, the lung. '
highlights_snippet: The warden meant to shoot the tranquilizer dart into the animal's shoulder or rump but the tranquilizer dart pierced the animal's lung tissue instead .
  