Based on the context and the answer, generate a question. 

Context: 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 ?

Answer:

Hakkai has experienced a concussion from battle .



Why is Hakkai feeling some mental fuzziness ?