Your task in prison is to bend things into different angles and then put them in the corner. No one will tell you why you're doing this, but you get a couple cents an hour to do it, so you aren't going to complain.
To get the angle right you find that you have to cock (かく) your head to the side a lot. After cocking your head at weird angles so much you also start to hear cocks crowing in your head. Cock-co-cock-co-caww!