Come on guys, you've already broken the first rule of Fight Club.
Seriously though, if you're already in prison then you know you're not good at getting away with crime, so why document yourself doing even more illegal acts?
It makes little sense to us, but seeing as these lads enjoy throwing bare-knuckle fists around for fun, we'll leave our criticism there.
The video takes place in Mount Eden Correctional Facility, Auckland, and has firmly put us off any investigative journalism that the prison system may throw our way. You can keep it, Louis Theroux.