Facial petechiae
Ecchymoses
Airway
Hoarseness
Stridor
Fracture of larynx, hyoid, thyroid cartilage
Laryngeal edema
Cardiopulmonary
Aspiration pneumonia
Cardiac arrest
Bradycardia
Negative-pressure pulmonary edema (NPPE)
Neurologic
Spinal cord trauma
Hangman's fracture uncommon
Neurogenic shock
Cerebral anoxia
Cerebral edema
Delayed dementia, amnesia, psychosis
Hoarseness
Stridor
Fracture of larynx, hyoid, thyroid cartilage
Laryngeal edema
Aspiration pneumonia
Cardiac arrest
Bradycardia
Negative-pressure pulmonary edema (NPPE)
Spinal cord trauma
Hangman's fracture uncommon
Neurogenic shock
Cerebral anoxia
Cerebral edema
Delayed dementia, amnesia, psychosis
Strangulation
Penetrating neck trauma
Rectal foreign body
Blunt neck trauma
Volvulus 
Vertebral and carotid artery dissection
Volvulus
Clogged G-tube