DJing is great, isn't it? So great that no set is ever, ever, long enough. Well, a greedy DJ can add one last, last, last tune to their set by blocking rivals who try to plug their head-phones into the mixer with 'the cold shoulder'. It's best accompanied by a vacant nod of affable incomprehension, as though they're the victim of a head injury that has robbed them of the concept of time. And manners.