Every act craves that strong connection with their audience – but how do you achieve this in a cavernous space like The O2 Arena, filled to the brim with around 20,000 fans (all, naturally, dressed in black)? Well, in typical belligerent style, Nine Inch Nails meet this challenge head on – treating us to a set by turns poetic and punishing, and despite the odd technical hiccup, really delivering that all important connection.