Case Three was a patient who presented with possible masseter muscle rigidity (MMR). After succinylcholine and propofol were given, the anesthesiologist tried to intubate the patient�s trachea. This was unsuccessful after three attempts. No generalized rigidity was noted. The case was cancelled. 5 hours later, the patient complained of severe myalgia. Urine was noted to be very dark red with �large� blood. Laboratory work-up showed: creatine kinase (CK) of 56,000 IU, and K⁺ of 4.4 mEq/l . Heart rate, temperature and other vital signs were normal throughout this episode. The following day: CK was 99,000 IU. Urine was clear and creatinine was normal. This case, therefore, presented with myalgia and rhabdomyolysis only without increased metabolism. Was Case Three MH?