He did n't see the need to go on ; Hakkai was smart enough to know which battle he meant -- the one that had left him wrapped in bandages for weeks . Hakkai stared blankly into the darkness as he swallowed that bit of information . Was it triggered by the head injury , perhaps ?

Based on the preceding passage, choose your answer for question Why is Hakkai feeling some mental fuzziness ?
Pick from:
-- Hakkai is experiencing a concussion .;
-- Hakkai is drunk .;
-- None of the above choices .;
-- Hakkai is just waking up .;
The answer is:
Hakkai is experiencing a concussion .