>> somebody wants to talk to him. you know what i'm saying? i got to sit down. >> i might have to come up like this, or he can just turn inside here and walk this way. >> yes. this is how you do it. you do your back that way. you know what i'm saying? >> ain't nobody gay up in here. >> few things in prison are as key to survival as having a good cell mate. >> when you live with a person 24 hours a day, you build up a brotherhood, a sense of -- you build up a rapport that you don't have with your family. and you're both dependent on each other for survival. >> but some cell mates can't get along. "lockup" crews have heard vivid accounts of inmates attacking their cellies. >> i got into an altercation with my bunky. i ended up stabbing him. >> i stuck my hand up his ass to my forearm and bashed his head and made him drink out that toilet. and took the toilet and strangled him. when they opened up the door, i tried to throw him off the tier. >> i tore the sheet and wrapped it around his head and i said, nope, you ain't doing nothing.