escorted by officer chris st. martinnd our crew, the return proved to be far more emotional than she could have imagined. >> here you go. safe and sound. you want my chair? sit down. sit down. there you go. you're good. >> though returning to the cell block was difficult, talley told us it was also cathartic. >> yeah, i was down for awhile. but i'm not dead. they didn't kill me. i'm okay. emotionally, i'll heal. some day. and the sleepless nights, and the worry, and the wonder, oh, my god is this ever going to happen to me again. i've dealt with most of that. and it's -- it's really a hard thing. >>> next, on "lockup: raw," an inmate turns violent against himself. >> [ bleep ] yeah! yeah! >> stop, stop. >> [ bleep ] [ bleep ] >> violence inside america's prisons comes in many forms. at iowa state penitentiary, we found that the most brutal violence is sometimes against ones self. >> open 11. >> 22-year-old inmate caleb suffered severe burns over two-thirds of his body when the methamphetamine lab he was running exploded.