He wasn't in the central chamber anymore, rather in one of the tunnel's 
aneurysms with some twenty other people, all just as naked as he was. He knew 
which tunnel led to the exit
(why?) and began to crawl down it, rather stiffly as it seemed that he was 
stiff and laden with cricks and cramps. Must not have been very athletic 
sex—more in the Tantric mode.