hi. the description that you have provided here is fairly complete, though a little more clarification would be more helpful. stiffened up body, lip bite, up rolled eye balls, poorly responding to your calls, confusion, and later complete unawareness of the whole incident might be a manifestation of a seizure episode (complex fits). kindly visit a neurologist for detailed evaluation. seizure onset around the age of 30 years is usually secondary to some underlying pathology, which needs to be uncovered. your friend might need a few investigations which might include an EEG and a CT scan of brain. further management will be according to the findings. hope this helps. Dr. A. Rao Kavoor