As a parody of the drama 'Prison Playbook,' the cast of 'Running Man' visited the actual set of the drama to experience the rules of the prison.
In order to choose the leader of the prison cell, the members had to prove themselves to be the trendiest leader. Among them was Song Ji Hyo, who flaunted the trendy moves of "Gashina." She also did a cute "butt dance" to brighten up the act!
You can catch this episode of 'Running Man' on January 28 at 4:50 PM (KST).