. >> narrator: bill hankins, a long-term inmate at colorado state penitentiary knows about sudden explosions. during a routine strip search, hankins snapped. >> i used to get real frustrated behind these doors. it used to drive me to where i'd be worked up, ooh, wanting to get out. >> narrator: hankins is serving life without parole for killing a grocery clerk during a robbery. in this super max security he is not allows contact with other inmates but released for an hour for daily solitary exercise. it's what keeps him going. >> being locked down every day for 23 hours a day and coming out in a little room to work out, you know it was difficult first couple of years, but then i realized, you know, i'm just giving myself high blood pressure. >> narrator: while lockup crews have shot dozens of workout routines, the strangest has to have been at the miami-dade county jail by two inmates who covered their faces to remain anonymous. >> with the arm right here, and the chest. i'm a trainer. you know? i got him this big. >> narrator: after a round of what they called bed lifts they showed us how t