. >> sergeant gilbert duran supervises the carefully choreographed restraint process. >> the deputies have been briefed as to who will take the upper body, who will take the lower body. extremities. sometimes it takes extra deputies to hold the upper body if they are struggling or upset about what's happening to them. >> about how many four-points are done per week? >> we average up here on day shift and p.m. from three to six. a day. >> as extreme as four-point restraints are, inmates sometimes take an equally extreme measure to attack officers. one that is particularly vile. >> gassing is what we call. a mixture of feces and urine sometimes fermented until it stews into something so grotesque you can't mention it. >> during 14 years on the job officer jones has never had a worse experience than being gassed. >> i'd rather be punched, be kicked, i'd rather be stabbed than to be gassed like i was back in '92. >> we never heard a more extreme account of gassing as the one described by kentucky state penitentiary inmate fleece johnson. >> i ask everybody on the wall to [ bleep ] in a bu