Other computer-generated imagery in the film includes the ant coming out of Dae-su's arm (according to the making-of on the DVD the whole arm was CGI) and the ants crawling over him afterwards. The octopus being eaten alive was not computer-generated; four were used during the making of this scene. Actor Choi Min-sik, a Buddhist, said a prayer for each one. The eating of squirming octopuses (called "san-nakji" (산낙지) in Korean) as a delicacy exists in East Asia, although it is usually killed and cut, not eaten whole and alive. Usually the nerve activity in the octopus' tentacles makes the pieces still squirm posthumously on the plate when served. When asked in DVD commentary if he felt sorry for Choi, director Park Chan-wook stated he felt more sorry for the octopus.