>> stand still. >> your constantly dealing with an evil force that's trying to destroy you, what do you do? >> each one of them is big. i don't care how big or how small they are. they can spit, throw feces, urine. spit blood. the whole nine yards. >> you can't be scared working in here. you can't let something like that determine how you're going to do your job. >> you get up in the morning, you're going to come in here thinking everything's going to be okay. it's not always so. there are good days and bad days. >> i need to go on 11. >> 11 range? >> 11 range. thank you. >> there are five psychologists assigned to the shu. dr. mary ruth sims routinely checks on the shu inmates. >> i've been here for 7 1/2 years. what i do is different every single day. some days i do groups. some days i do individuals. some days it's crisis all day. hey, did you want me to pick up a letter? was that meant for me?