worried how the inmates might react to it. but he dealt with it in, again, in a humorous way. >> we don't want you to develop permanent movements. >> yes. >> because one day you're going to get out of prison and you'll be out there. you're going to meet a beautiful woman and fall in love. and you don't want to be twitching when you're talking to her. >> he's really quite a different person now. so you know, we'll continue to support him in whatever way makes sense, continue to encourage his good functioning. he's come a really long way. >> but on one of the other days we were following dr. matias we encountered a far more agitated inmate. mark hughes. >> you're just an fbi investigation going on from this facility right here, have my family kidnapped -- >> just seconds later hughes lashed out at an inmate in a nearby cell. >> man-y don't you shut the [ bleep ]. knock your teeth out.