" That 's why I thought you might be ill . " Sanzo 's frown deepened as he stared at the ground and ran a hand through his hair in distraction . " ... I ' m sorry , " he mumbled , shocking Hakkai and not paying attention at all to what he was saying as he retreated back inside .
According to the above context, answer the following question.
Why might have Hakkai been shocked by Sanzo ?


Hakkai might not have been expecting to hear Sanzo say he was sorry .