I tagged along with Mike and his friend Stu to Ophir yesterday . After waiting around for an hour , Grizz ( a large but friendly man ) showed up and let us into the Emma Mine as far as the shaft ... He would n't come along himself because he 's claustrophobic . He told us he does n't want anybody going back without Tyler ( a man who is much like a son to him , from what I heard ) because of liability issues .
According to the above context, answer the following question.
Why was Grizz not with the group ?


Grizz does not like tight spaces .